subject:(Nanomagnetism)

Cornell University

1. Lee, Ouk Jae. Non-Collinear Spin-Torque Driven Excitation In Nanomagnets.

Degree: PhD, Applied Physics, 2013, Cornell University

► This dissertation summarizes my investigations in non-collinear spin-transfertorque (ST) effects on nanomagnets. The Slonczewksi-like ST mostly competes with the damping torque in a device structure… (more)

▼ This dissertation summarizes my investigations in non-collinear spin-transfertorque (ST) effects on nanomagnets. The Slonczewksi-like ST mostly competes with the damping torque in a device structure where the spin polarization (SP) is collinear to the magnetic moment of a free layer (FL) at equilibrium. Contrarily the ST has both (anti-)damping and an equivalent field torque effects in non-collinear configurations in which the SP is close to perpendicular to the FL. The additional field effect of the ST shifts the equilibrium or dynamic offset angle of the FL and thereby changes the characteristics of the excitations. In my first study, I demonstrated the ST-driven ultrafast nanomagnet switching in nanopillar spin-valve devices incorporating both an out-of-plane spinpolarizer and an in-plane polarizer/analyzer, with pulse widths down to 50 ps. I also explained the physical origin of the observed asymmetric threshold currents as functions of the switching direction and the pulse polarity, which is beneficial for a non-toggle write operation. In addition I proposed methods to suppress the magnetic ringing that occurs after the ballistic switching. In my second study, I discovered quasi-linear behavior of a spin-torque nano-oscillator under an external hard axis magnetic field that controls the precession axis of the FL and its offset angle from the SP. The observed linewidth (~ 5 MHz) was very close to the fundamental limit determined by thermal driven noise. The quasi-linearity, or the cancellation of the nonlinear coupling between the amplitude fluctuation and phase noise, was achieved by obtaining a small frequency agility together with a negative feedback effect from the ST causing the enhancement of the dynamical damping. In my third study, I investigated perpendicularly magnetized Co nanodot switching via spin-Hall-induced spin currents. In the thermally activated reversal regime I estimated the current-induced effective field (H s ) that has a magnitude within the predicted range due to the large spin-Hall angle in Pt when the Joule heating effect is taken into account for the magnetic system. In addition an excitation of a subvolume drove the entire magnetization switching, thus even a small but heat-assisted H s was able to reverse such a Co dot with a strong perpendicular magnetic anisotropy. Advisors/Committee Members: Buhrman, Robert A (chair), Van Dover, Robert B. (committee member), Ralph, Daniel C (committee member).

Subjects/Keywords: spin transfer torque; spintronics; nanomagnetism

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APA (6^th Edition):

Lee, O. J. (2013). Non-Collinear Spin-Torque Driven Excitation In Nanomagnets. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/33915

Chicago Manual of Style (16^th Edition):

Lee, Ouk Jae. “Non-Collinear Spin-Torque Driven Excitation In Nanomagnets.” 2013. Doctoral Dissertation, Cornell University. Accessed April 11, 2021. http://hdl.handle.net/1813/33915.

MLA Handbook (7^th Edition):

Lee, Ouk Jae. “Non-Collinear Spin-Torque Driven Excitation In Nanomagnets.” 2013. Web. 11 Apr 2021.

Vancouver:

Lee OJ. Non-Collinear Spin-Torque Driven Excitation In Nanomagnets. [Internet] [Doctoral dissertation]. Cornell University; 2013. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1813/33915.

Council of Science Editors:

Lee OJ. Non-Collinear Spin-Torque Driven Excitation In Nanomagnets. [Doctoral Dissertation]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/33915

Penn State University

2. Zhang, Sheng. Tuning geometries and interactions of artificial frustrated nanomagnets.

Degree: 2013, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/16561

► Geometrical frustration occurs in systems where not all the competing interactions can be minimized simultaneously due to the specific geometries. An example of geometrically frustrated… (more)

▼ Geometrical frustration occurs in systems where not all the competing interactions can be minimized simultaneously due to the specific geometries. An example of geometrically frustrated magnetic materials is spin ice, which is in pyrochlore structure with corner sharing tetrahedra and exhibits zero-point entropy and emergent monopole excitations. However, in spin ice materials the lattice geometry cannot be controlled easily and individual spins cannot be probed. In order to investigate the local accommodation of frustration, our group developed artificial frustrated arrays consisting of lithographically fabricated single-domain nanomagnets. These arrays are arranged in different geometries and lattice constants, allowing us to control the symmetry and strength of the magnetostatic interactions. Several geometries have been studied: a square lattice, which shows ice-like, short-range correlations analogous to the spin ice materials; a hexagonal (kagome) lattice, which shows large degenerate ground states and monopole-like elementary excitations; and a triangular lattice, in which we found that indirect interactions and those mediated by further neighbors can be tuned to be dominant over direct interactions. We have also studied frustrated arrays comprised of nanomagnets with magnetic moments perpendicular to the substrate plane. These perpendicular arrays exhibit striking similarity to their in-plane counterparts, indicating a universality in artificial frustrated systems independent of material realization or moment orientations. Recently, our group developed a method of thermally annealing the artificial frustrated systems and achieved long-range ordered ground state domains, especially the thermally annealed hexagonal lattice arrays show evidence of a magnetic charge ordered state which has been predicted by theorists but never experimentally observed before. Advisors/Committee Members: Peter E Schiffer, Dissertation Advisor/Co-Advisor, Nitin Samarth, Committee Chair/Co-Chair, Vincent Henry Crespi, Committee Member, Raymond Edward Schaak, Special Member.

Subjects/Keywords: Geometrical frustration; Artificial spin ice; Nanomagnetism

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhang, S. (2013). Tuning geometries and interactions of artificial frustrated nanomagnets. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/16561

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhang, Sheng. “Tuning geometries and interactions of artificial frustrated nanomagnets.” 2013. Thesis, Penn State University. Accessed April 11, 2021. https://submit-etda.libraries.psu.edu/catalog/16561.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhang, Sheng. “Tuning geometries and interactions of artificial frustrated nanomagnets.” 2013. Web. 11 Apr 2021.

Vancouver:

Zhang S. Tuning geometries and interactions of artificial frustrated nanomagnets. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Apr 11]. Available from: https://submit-etda.libraries.psu.edu/catalog/16561.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhang S. Tuning geometries and interactions of artificial frustrated nanomagnets. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/16561

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Manitoba

3. Desautels, Ryan. Mediating the exchange coupling and anisotropy in nanoscale magnets via interfacial interactions.

Degree: Physics and Astronomy, 2012, University of Manitoba

URL: http://hdl.handle.net/1993/31037

► Nanoscale materials behave differently than their bulk counterparts due, in part, to the reduced length scales and the increased surface to core atom ratio. As… (more)

▼ Nanoscale materials behave differently than their bulk counterparts due, in part, to the reduced length scales and the increased surface to core atom ratio. As the length scales decrease, the surface atoms become increasingly important as they make up a larger percentage of the total number of atoms. These surface atoms have magnetic properties that differ from the core atoms due to a surface anisotropy that alters the interparticle, intraparticle, and exchange interactions. In this work, we have synthesized three different nanoscale systems that will allow us to explore the physics of the different interactions. Cu/gamma-Fe2O3 core/shell nanoparticles were chosen because the gamma-Fe2O3 cores have vacancies in their B-sites, broken coordination at the surface, and experience superexchange interactions. As a comparison, multiphase undoped and V-doped SiO2/FeCo nanoparticles were chosen as these nanoparticles do not suffer from vacancies or surface disorder and experience both direct exchange interactions from the nanoparticle core and superexchange interactions between the FeCo core and the metal silicate interfacial phase. Finally, Fe nanocrystallites were grown in a Cu matrix as they present no vacancies or surface disorder, and they are single phase. We observed that the interfacial phases that form in these core/shell and nanocrystallite/matrix nanoscale systems alters significantly the physics of the magnetism. The overall magnetic properties, the elemental magnetism, and the atomic magnetism were all observed to be altered by this interfacial phase, along with the interparticle and intraparticle interactions. In addition, the thickness of this interfacial phase, and thus the strength of its affect, was controlled by controlling the thickness of the shells or the amount of intermixing in the case of the nanostructured thin film. Advisors/Committee Members: van Lierop, Johan (Physics and Astronomy) (supervisor), Southern, Byron (Physics and Astronomy).

Subjects/Keywords: Nanomagnetism; Exchange coupling; Anisotropy; Interfacial interactions

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APA (6^th Edition):

Desautels, R. (2012). Mediating the exchange coupling and anisotropy in nanoscale magnets via interfacial interactions. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/31037

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Desautels, Ryan. “Mediating the exchange coupling and anisotropy in nanoscale magnets via interfacial interactions.” 2012. Thesis, University of Manitoba. Accessed April 11, 2021. http://hdl.handle.net/1993/31037.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Desautels, Ryan. “Mediating the exchange coupling and anisotropy in nanoscale magnets via interfacial interactions.” 2012. Web. 11 Apr 2021.

Vancouver:

Desautels R. Mediating the exchange coupling and anisotropy in nanoscale magnets via interfacial interactions. [Internet] [Thesis]. University of Manitoba; 2012. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1993/31037.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Desautels R. Mediating the exchange coupling and anisotropy in nanoscale magnets via interfacial interactions. [Thesis]. University of Manitoba; 2012. Available from: http://hdl.handle.net/1993/31037

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

4. Veena Gopalan, E. On the Synthesis and Multifunctional Properties of some Nanocrystalline Spinel Ferrites and Magnetic Nanocomposites.

Degree: Physics, 2009, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/2544

►

This thesis lays importance in the preparation and characterization of a few selected representatives of the ferrite family in the nanoregime. The candidates being manganese… (more)

Subjects/Keywords: Magnetism; Ferrites; Nanomagnetism; Nanocrystalline Spinel Ferrites; Magnetic Nanocomposites

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APA (6^th Edition):

Veena Gopalan, E. (2009). On the Synthesis and Multifunctional Properties of some Nanocrystalline Spinel Ferrites and Magnetic Nanocomposites. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/2544

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Veena Gopalan, E. “On the Synthesis and Multifunctional Properties of some Nanocrystalline Spinel Ferrites and Magnetic Nanocomposites.” 2009. Thesis, Cochin University of Science and Technology. Accessed April 11, 2021. http://dyuthi.cusat.ac.in/purl/2544.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Veena Gopalan, E. “On the Synthesis and Multifunctional Properties of some Nanocrystalline Spinel Ferrites and Magnetic Nanocomposites.” 2009. Web. 11 Apr 2021.

Vancouver:

Veena Gopalan E. On the Synthesis and Multifunctional Properties of some Nanocrystalline Spinel Ferrites and Magnetic Nanocomposites. [Internet] [Thesis]. Cochin University of Science and Technology; 2009. [cited 2021 Apr 11]. Available from: http://dyuthi.cusat.ac.in/purl/2544.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Veena Gopalan E. On the Synthesis and Multifunctional Properties of some Nanocrystalline Spinel Ferrites and Magnetic Nanocomposites. [Thesis]. Cochin University of Science and Technology; 2009. Available from: http://dyuthi.cusat.ac.in/purl/2544

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Berkeley

5. Mesler, Brooke Lu. Nanoscale Studies of Spin Dynamics in Confined Geometries Using Soft X-ray Transmission Microscopy.

Degree: Applied Science & Technology, 2010, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/2hd058qs

► Understanding and controlling the manipulation of spin structures on a nanometer length scale is of primary importance to contemporary scientific investigations and future technological applications… (more)

▼ Understanding and controlling the manipulation of spin structures on a nanometer length scale is of primary importance to contemporary scientific investigations and future technological applications of magnetic materials. Soft x-ray transmission microscopy offers imaging with a spatial resolution down to 10 nm, and a temporal resolution of about 70 psec, with element specific magnetic contrast. As such, it is an ideal method for studying fast nanoscale spin dynamics. The focus of this dissertation is on imaging the response of magnetic vortex cores to external applied fields using soft x-ray transmission microscopy. A technique for pinpointing vortex dynamics without time resolution was used to survey the response of a vortex core to RF fields of varying frequency and amplitude. This investigation revealed an unexpected nonlinear response of the vortex core at higher amplitude driving frequencies. Time-resolved images of the vortex core response in the linear regime were taken using a technique which phase-locked the RF driving field to the x-ray imaging pulses. These experimental images probing the frequency response of the vortex core motion are the initial step towards a deeper understanding of the behavior of the vortex core when driven by magnetic fields with frequencies near its resonant frequency.In addition to investigating the dynamic response of a single vortex core, a magnetic system with two interacting vortex cores was studied. A patterned rectangular magnetic sample with a 7-domain magnetization configuration and two vortex cores at remanence was used in this experiment. The magnetization of this sample was imaged after the application of a fast magnetic field pulse using a pump-probe time-resolved imaging technique. The images taken showed a distortion of the vortex cores after the pulse was applied, and combined with simulation, these results provide strong evidence for the creation and annihilation of vortex-antivortex core pairs during the excitation of the initial vortices. This lends support to the many theories suggesting that a vortex-antivortex core pair is created and annihilated during the switching of vortex core polarity.The studies outlined in this dissertation demonstrate the strength of transmission soft x-ray microscopy as a tool for investigating spin dynamics.

Subjects/Keywords: Nanoscience; Materials Science; Electromagnetics; lithography; nanomagnetism; x-ray microscopy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mesler, B. L. (2010). Nanoscale Studies of Spin Dynamics in Confined Geometries Using Soft X-ray Transmission Microscopy. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/2hd058qs

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mesler, Brooke Lu. “Nanoscale Studies of Spin Dynamics in Confined Geometries Using Soft X-ray Transmission Microscopy.” 2010. Thesis, University of California – Berkeley. Accessed April 11, 2021. http://www.escholarship.org/uc/item/2hd058qs.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mesler, Brooke Lu. “Nanoscale Studies of Spin Dynamics in Confined Geometries Using Soft X-ray Transmission Microscopy.” 2010. Web. 11 Apr 2021.

Vancouver:

Mesler BL. Nanoscale Studies of Spin Dynamics in Confined Geometries Using Soft X-ray Transmission Microscopy. [Internet] [Thesis]. University of California – Berkeley; 2010. [cited 2021 Apr 11]. Available from: http://www.escholarship.org/uc/item/2hd058qs.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mesler BL. Nanoscale Studies of Spin Dynamics in Confined Geometries Using Soft X-ray Transmission Microscopy. [Thesis]. University of California – Berkeley; 2010. Available from: http://www.escholarship.org/uc/item/2hd058qs

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

6. Kolthammer, Joseph Edward. Chirality control and magnetization dynamics in a dual vortex spin valve nanopillar.

Degree: Department of Physics and Astronomy, 2017, University of Victoria

URL: http://hdl.handle.net/1828/8022

► A new method for dynamic chirality control of a magnetic vortex is demonstrated with micromagnetic simulations. Spin transfer torque and giant magnetoresistance in an asymmetric… (more)

Subjects/Keywords: nanomagnetism; simulation; vortex

…practical applications and fundamental interests, and a central goal of nanomagnetism research is…

12 more images…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kolthammer, J. E. (2017). Chirality control and magnetization dynamics in a dual vortex spin valve nanopillar. (Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/8022

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kolthammer, Joseph Edward. “Chirality control and magnetization dynamics in a dual vortex spin valve nanopillar.” 2017. Thesis, University of Victoria. Accessed April 11, 2021. http://hdl.handle.net/1828/8022.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kolthammer, Joseph Edward. “Chirality control and magnetization dynamics in a dual vortex spin valve nanopillar.” 2017. Web. 11 Apr 2021.

Vancouver:

Kolthammer JE. Chirality control and magnetization dynamics in a dual vortex spin valve nanopillar. [Internet] [Thesis]. University of Victoria; 2017. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1828/8022.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kolthammer JE. Chirality control and magnetization dynamics in a dual vortex spin valve nanopillar. [Thesis]. University of Victoria; 2017. Available from: http://hdl.handle.net/1828/8022

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

7. Novikova, Anastasiia. Nanofils ferromagnétiques en matrice de CeO2 et de SrTiO3 : de la compréhension de la structure locale aux propriétés magnétiques : Ferromagnetic nanowires embedded in CeO2 : from the understanding of the local structure to individual magnetic and transport properties.

Degree: Docteur es, Physique des Matériaux et Milieux Denses, 2015, Versailles-St Quentin en Yvelines

URL: http://www.theses.fr/2015VERS024V

►

Cette thèse est consacrée à l’étude de la structure et des propriétés magnétiques de nanofils ferromagnétiques de diamètre entre 2 et 7 nm, formés par… (more)

▼

Cette thèse est consacrée à l’étude de la structure et des propriétés magnétiques de nanofils ferromagnétiques de diamètre entre 2 et 7 nm, formés par auto-assemblage dans des couches minces de CeO2 ou SrTiO3 déposées sur substrat SrTiO3(001).Grâce à la Spectroscopie d’Absorption des rayons X (XAS) ainsi que la Magnétométrie à l’échantillon Vibrant (VSM) nous avons étudié des nanofils de Co, Ni et CoNi. Cette étude montre qu’à température ambiante et à pression atmosphérique les nanofils de Co peuvent exister dans les phases hcp et/ou fcc alors que l’ajout de Ni stabilise la structure fcc.Nous présentons aussi la stabilité de la structure et des propriétés magnétiques en fonction de la température et nous décrivons en particulier les effets d’une procédure de recuit oxydant, suivi d’un recuit sous vide comme un possible outil de modulation de la structure et des propriétés des nanofils.Les études XAS mettent en évidence l’existence de dichroïsme linéaire pour des nanofils de Co et CoNi avec des diamètres extrêmement faibles (moins de 2nm). Nous en discutons les possibles origines de ce dichroïsme : effets d’étirement et de taille finie.In fine, une tentative de croissance auto-organisée de couches minces de CeO2 ou SrxBayTiO3 dopées au fer est présentée. Dans la matrice CeO2 la microscopie électronique à transmission ne détecte pas de nanofils et le XAS montre une grande variété d’oxydes de fer différents, malgré des conditions de croissance très proches. La formation de nanofils en matrice SrxBayTiO3 est suggérée par les propriétés magnétiques (hystérèse et anisotropie) et la composition des nanofils déterminée par le XAS met en évidence les phases α-Fe et FeO.

This PhD thesis is dedicated to the structural and magnetic studies of self-assembled ferromagnetic nanowires with diameters of 2-7 nm embedded in CeO2 (or SrTiO3) thin films grown on SrTiO3 (001) substrates.By means of X-rays Absorption Spectroscopy (XAS) and Vibrating Sample Magnetometry (VSM) Co, Ni and CoNi nanowires are studied. This study shows that at ambient temperature and pressure cobalt nanowires may contain Co-hcp or Co-fcc phase, while adding Ni stabilizes the fcc.This study also discusses structural and magnetic stability as a function of temperature under different thermal treatments. We describe in particular the effects of oxidative treatment followed by high vacuum annealing as a tool to tune the structure and magnetic properties of cobalt nanowires. XAS evidences linear dichroism in Ni and CoNi embedded nanowires of extremely small diameter (less than 2nm). We discuss possible origins of these phenomena considering the effects of strain and finite size of the objects.Finally, an essay of growing CeO2 or SrxBayTiO3 thin films doped by Fe is presented. It shows that within the CeO2 matrix no nanowires are evidenced by TEM, while XAS shows a large variety of different iron oxides even if the growth conditions are not drastically modified from one sample to another. As it is suggested by the magnetic measurements (hysteresis and anisotropy),…

Advisors/Committee Members: Dumont, Yves (thesis director), Fonda, Emiliano (thesis director).

Subjects/Keywords: Nanofils; Nanomagnétisme; Ferromagnétisme; Cobalt; Fer; Nickel; XAS; Nanowires; Nanomagnetism; Ferromagnetism; 538

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Novikova, A. (2015). Nanofils ferromagnétiques en matrice de CeO2 et de SrTiO3 : de la compréhension de la structure locale aux propriétés magnétiques : Ferromagnetic nanowires embedded in CeO2 : from the understanding of the local structure to individual magnetic and transport properties. (Doctoral Dissertation). Versailles-St Quentin en Yvelines. Retrieved from http://www.theses.fr/2015VERS024V

Chicago Manual of Style (16^th Edition):

Novikova, Anastasiia. “Nanofils ferromagnétiques en matrice de CeO2 et de SrTiO3 : de la compréhension de la structure locale aux propriétés magnétiques : Ferromagnetic nanowires embedded in CeO2 : from the understanding of the local structure to individual magnetic and transport properties.” 2015. Doctoral Dissertation, Versailles-St Quentin en Yvelines. Accessed April 11, 2021. http://www.theses.fr/2015VERS024V.

MLA Handbook (7^th Edition):

Novikova, Anastasiia. “Nanofils ferromagnétiques en matrice de CeO2 et de SrTiO3 : de la compréhension de la structure locale aux propriétés magnétiques : Ferromagnetic nanowires embedded in CeO2 : from the understanding of the local structure to individual magnetic and transport properties.” 2015. Web. 11 Apr 2021.

Vancouver:

Novikova A. Nanofils ferromagnétiques en matrice de CeO2 et de SrTiO3 : de la compréhension de la structure locale aux propriétés magnétiques : Ferromagnetic nanowires embedded in CeO2 : from the understanding of the local structure to individual magnetic and transport properties. [Internet] [Doctoral dissertation]. Versailles-St Quentin en Yvelines; 2015. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2015VERS024V.

Council of Science Editors:

Novikova A. Nanofils ferromagnétiques en matrice de CeO2 et de SrTiO3 : de la compréhension de la structure locale aux propriétés magnétiques : Ferromagnetic nanowires embedded in CeO2 : from the understanding of the local structure to individual magnetic and transport properties. [Doctoral Dissertation]. Versailles-St Quentin en Yvelines; 2015. Available from: http://www.theses.fr/2015VERS024V

Université Catholique de Louvain

8. Abreu Araujo, Flavio. Dynamical and synchronization properties of vortex based spin-torque nano-oscillators.

Degree: 2015, Université Catholique de Louvain

URL: http://hdl.handle.net/2078.1/157884

►

The research conducted during this PhD thesis aims at studying the microwave emission and the synchronization properties of nanoscale oscillators driven by the spin-transfer torque… (more)

Subjects/Keywords: Spintronics; Spin-transfer; Magnetic nanowires; Vortex; Nanomagnetism; Nano-oscillator

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APA (6^th Edition):

Abreu Araujo, F. (2015). Dynamical and synchronization properties of vortex based spin-torque nano-oscillators. (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/157884

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Abreu Araujo, Flavio. “Dynamical and synchronization properties of vortex based spin-torque nano-oscillators.” 2015. Thesis, Université Catholique de Louvain. Accessed April 11, 2021. http://hdl.handle.net/2078.1/157884.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Abreu Araujo, Flavio. “Dynamical and synchronization properties of vortex based spin-torque nano-oscillators.” 2015. Web. 11 Apr 2021.

Vancouver:

Abreu Araujo F. Dynamical and synchronization properties of vortex based spin-torque nano-oscillators. [Internet] [Thesis]. Université Catholique de Louvain; 2015. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/2078.1/157884.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Abreu Araujo F. Dynamical and synchronization properties of vortex based spin-torque nano-oscillators. [Thesis]. Université Catholique de Louvain; 2015. Available from: http://hdl.handle.net/2078.1/157884

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Ottawa

9. Holmberg, Rebecca Jane. Probing Nanomagnetism through a Materials Approach: Paramagnetic Ions within Nanomaterials .

Degree: 2016, University of Ottawa

URL: http://hdl.handle.net/10393/35057

► This thesis will describe the magnetic behavior found in a scaling array of magnetic nanomaterials that have been uniquely designed, synthesized and characterised in order… (more)

▼ This thesis will describe the magnetic behavior found in a scaling array of magnetic nanomaterials that have been uniquely designed, synthesized and characterised in order to better understand their properties with regards to potential future applications. Within Chapter 1 will be a detailed, yet accessible, introduction to nanomagnetism and the fundamental principles and practical techniques essential to the study of this unique mélange of physics and chemistry. This chapter will be designed to give the reader the necessary tools to understand key literature concepts found in Chapter 2, as well as the work presented in the following chapters. Chapter 2 will provide an overview of relevant literature in the field of magnetic nanomaterials, including: nanoparticles, single-molecule magnets, single-chain magnets and metal-organic frameworks. Chapter 3 will describe work performed on nanoparticles doped with lanthanide ions in order to explore their resulting size, shape, crystallinity and magnetic properties. The relevance of the chosen particles (NaYF4) pertains to their proposed use in a variety of applications due to their known luminescent properties, which we sought to hybridize with interesting magnetic properties, thus creating multimodal imaging capabilities. Doping with a variety of desired ratios of lanthanide ions (GdIII, TbIII, DyIII, ErIII and YbIII) was successful, producing crystalline nanoparticles with tunable size and shape. Magnetic measurements displayed a clear absence of superparamagnetic behavior, indicating that these materials have the potential to be well-suited to applications in biomedicine as multimodal imaging probes and MRI contrast agents. Chapter 4 will build on the previously explored doped nanomaterials through creating a hybrid nanomaterial by tethering lanthanide-based magnetic molecules to the surface of nanoparticles. This is performed through the synthetic design of a SMM with two anisotropic DyIII ions, which was synthesized and designed to bear terminal S-groups in order to promote the binding of the magnetic molecule to capping agent free gold nanoparticles. Upon confirmation of the successful surface attachment of the molecules, magnetic measurements displayed that the magnetic molecules maintained their static properties, however, their dynamic properties were altered. This system was the first example of this type of novel approach to the study of magnetic molecules on surfaces for data storage, spintronics, and quantum computing applications. Chapter 5 will expand on the previous study of ordering arrays of magnetic molecules on the surface of nanoparticles by tethering them into 1D chain networks. We successfully synthesized chain networks with YIII, EuIII, GdIII, TbIII and DyIII lanthanide ions. Magnetic characterisation revealed slow relaxation of the magnetization with no significant interactions between magnetic ions, thus these are discrete magnetic molecules in 1D. Rather surprisingly, the isotropic GdIII analogue displayed field induced slow relaxation of…

Subjects/Keywords: Nanomagnetism; Metal-organic framework; Nanoparticles; Single molecule magnet

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APA (6^th Edition):

Holmberg, R. J. (2016). Probing Nanomagnetism through a Materials Approach: Paramagnetic Ions within Nanomaterials . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/35057

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Holmberg, Rebecca Jane. “Probing Nanomagnetism through a Materials Approach: Paramagnetic Ions within Nanomaterials .” 2016. Thesis, University of Ottawa. Accessed April 11, 2021. http://hdl.handle.net/10393/35057.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Holmberg, Rebecca Jane. “Probing Nanomagnetism through a Materials Approach: Paramagnetic Ions within Nanomaterials .” 2016. Web. 11 Apr 2021.

Vancouver:

Holmberg RJ. Probing Nanomagnetism through a Materials Approach: Paramagnetic Ions within Nanomaterials . [Internet] [Thesis]. University of Ottawa; 2016. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10393/35057.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Holmberg RJ. Probing Nanomagnetism through a Materials Approach: Paramagnetic Ions within Nanomaterials . [Thesis]. University of Ottawa; 2016. Available from: http://hdl.handle.net/10393/35057

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

10. Newman, Kelly. Magnetism in amorphous and crystalline FeCo and FeCo/SiO2 nanoparticles.

Degree: Physics and Astronomy, 2017, University of Manitoba

URL: http://hdl.handle.net/1993/32488

► Amorphous FeCo nanoparticles were synthesized using a scalable metal halide reduction. Post-synthesis treatments were used to create larger, more crystalline nanoparticles. Both the amorphous and… (more)

Subjects/Keywords: Magnetism; Nanoparticles; Nanomagnetism

…to thank my fellow members of the Nanomagnetism Research Group: Palash, Ryan, Liz, Yaro…

10 more images…

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APA (6^th Edition):

Newman, K. (2017). Magnetism in amorphous and crystalline FeCo and FeCo/SiO2 nanoparticles. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/32488

Chicago Manual of Style (16^th Edition):

Newman, Kelly. “Magnetism in amorphous and crystalline FeCo and FeCo/SiO2 nanoparticles.” 2017. Masters Thesis, University of Manitoba. Accessed April 11, 2021. http://hdl.handle.net/1993/32488.

MLA Handbook (7^th Edition):

Newman, Kelly. “Magnetism in amorphous and crystalline FeCo and FeCo/SiO2 nanoparticles.” 2017. Web. 11 Apr 2021.

Vancouver:

Newman K. Magnetism in amorphous and crystalline FeCo and FeCo/SiO2 nanoparticles. [Internet] [Masters thesis]. University of Manitoba; 2017. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1993/32488.

Council of Science Editors:

Newman K. Magnetism in amorphous and crystalline FeCo and FeCo/SiO2 nanoparticles. [Masters Thesis]. University of Manitoba; 2017. Available from: http://hdl.handle.net/1993/32488

11. Hamelin, Claire. Couples de spin-orbite en vue d'applications aux mémoires cache : Spin orbit torques for cache memory applications.

Degree: Docteur es, Nanophysique, 2016, Université Grenoble Alpes (ComUE)

URL: http://www.theses.fr/2016GREAY061

►

Le remplacement des technologies DRAM et SRAM des mémoires caches est un enjeu pour l’industrie microélectronique qui doit faire face à des demandes de miniaturisation,… (more)

▼

Le remplacement des technologies DRAM et SRAM des mémoires caches est un enjeu pour l’industrie microélectronique qui doit faire face à des demandes de miniaturisation, de réduction des amplitudes et des durées des courants d’écriture et de lecture des données. Les mémoires à accès direct magnétiques (MRAM) sont des candidates pour une future génération de mémoires et la découverte des couples de spin-orbite (SOT) a ouvert la voix à une combinaison des deux technologies appelée SOT-MRAM. Ces mémoires sont très prometteuses car elles allient non-volatilité et bonne fiabilité, mais de nombreux défis techniques et théoriques restent à relever.L’objectif de ce travail de thèse est d’étudier le retournement de l’aimantation par couple de spin-orbite avec des impulsions de courant sub-nanoseconde et de diminuer les courants d’écriture à couple de spin-orbite. Ce travail est préliminaire à la preuve de concept d’une mémoire SOT-MRAM écrite avec des impulsions de courant électrique ultra-courtes et des amplitudes relativement faibles.Pour cela nous avons étudié des cellules mémoire à base de Ta-CoFeB-MgO. Nous avons vérifié les dépendances du courant critique en durées d’impulsions et en un champ magnétique extérieur. Nous avons ensuite, sur une cellule type SOT-MRAM, prouvé l’écriture ultrarapide avec des impulsions de courant inférieures à la nanoseconde. Puis nous nous sommes intéressés à la diminution du courant d’écriture de SOT-MRAM à l’aide d’un champ électrique. Nous avons démontré que ce dernier permet de modulerl’anisotropie magnétique. Sa diminution lors d’une impulsion de courant dans la liste de tantale montre que la densité de courant critique pour le retournement de l’aimantation du CoFeB par SOT est réduite. Ces résultats sont très encourageants pour le développement des SOT-MRAM et incitent à approfondir ces études. Le mécanisme de retournement de l’aimantation semble être une nucléation puis une propagation de parois de domaines magnétiques. Cette hypothèse se fonde sur des tendances physiques observées lors des expériences ainsi que sur des simulations numériques.

They require smaller areas for bigger storage densities, non-volatility as well as reduced and shorter writing electrical currents. Magnetic Random Access Memory (MRAM) is one of the best candidates for the replacement of SRAM and DRAM. Moreover, the recent discovery of spin-orbit torques (SOT) may lead to a new technology called SOT-MRAM. These promising technologies combine non-volatility and good reliability but many challenges still need to be taken up.This thesis aims at switching magnetization by spin-orbit torques with ultra-fast current pulse and at reducing their amplitude. This preliminary work should enable one to proof the concept of SOT-MRAM written with short current pulses and low electrical consumption to write a memory cell.To do so, we studied Ta-CoFeB-MgO-based memory cells for which we verified current dependencies on pulse lengths and external magnetic field. Then we proved the ultrafast writing of a SOT-MRAM cell with…

Advisors/Committee Members: Gaudin, Gilles (thesis director), Boulle, Olivier (thesis director).

Subjects/Keywords: Spintronique; Mémoires caches; Nanomagnétisme; Spintronic; Cache memory; Nanomagnetism; 530

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APA (6^th Edition):

Hamelin, C. (2016). Couples de spin-orbite en vue d'applications aux mémoires cache : Spin orbit torques for cache memory applications. (Doctoral Dissertation). Université Grenoble Alpes (ComUE). Retrieved from http://www.theses.fr/2016GREAY061

Chicago Manual of Style (16^th Edition):

Hamelin, Claire. “Couples de spin-orbite en vue d'applications aux mémoires cache : Spin orbit torques for cache memory applications.” 2016. Doctoral Dissertation, Université Grenoble Alpes (ComUE). Accessed April 11, 2021. http://www.theses.fr/2016GREAY061.

MLA Handbook (7^th Edition):

Hamelin, Claire. “Couples de spin-orbite en vue d'applications aux mémoires cache : Spin orbit torques for cache memory applications.” 2016. Web. 11 Apr 2021.

Vancouver:

Hamelin C. Couples de spin-orbite en vue d'applications aux mémoires cache : Spin orbit torques for cache memory applications. [Internet] [Doctoral dissertation]. Université Grenoble Alpes (ComUE); 2016. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2016GREAY061.

Council of Science Editors:

Hamelin C. Couples de spin-orbite en vue d'applications aux mémoires cache : Spin orbit torques for cache memory applications. [Doctoral Dissertation]. Université Grenoble Alpes (ComUE); 2016. Available from: http://www.theses.fr/2016GREAY061

University of Illinois – Urbana-Champaign

12. Gilbert, Ian. Ground states in artificial spin ice.

Degree: PhD, Physics, 2015, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/78318

► Artificial spin ice is a class of arrays of interacting ferromagnetic nanoislands that are used to experimentally model Ising spin systems. It has been successfully… (more)

Subjects/Keywords: Ising model; statistical mechanics; micromagnetics; nanomagnetism; frustrated magnetism; artificial spin ice

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APA (6^th Edition):

Gilbert, I. (2015). Ground states in artificial spin ice. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/78318

Chicago Manual of Style (16^th Edition):

Gilbert, Ian. “Ground states in artificial spin ice.” 2015. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 11, 2021. http://hdl.handle.net/2142/78318.

MLA Handbook (7^th Edition):

Gilbert, Ian. “Ground states in artificial spin ice.” 2015. Web. 11 Apr 2021.

Vancouver:

Gilbert I. Ground states in artificial spin ice. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/2142/78318.

Council of Science Editors:

Gilbert I. Ground states in artificial spin ice. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/78318

University of California – Berkeley

13. Wu, Jie. Nanomagnetism research: benefit from reduced dimensionality and interfaces.

Degree: Physics, 2010, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/0cm863nn

► Along the effort of integrating the spin degree of freedom in electronic devices, magnetic structures at the nanometer scale are intensely studied because of their… (more)

Subjects/Keywords: Condensed matter physics; Nanoscience; magnetic microscopy; magnetic thin films; MBE; nanomagnetism; X ray absorption

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APA (6^th Edition):

Wu, J. (2010). Nanomagnetism research: benefit from reduced dimensionality and interfaces. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/0cm863nn

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wu, Jie. “Nanomagnetism research: benefit from reduced dimensionality and interfaces.” 2010. Thesis, University of California – Berkeley. Accessed April 11, 2021. http://www.escholarship.org/uc/item/0cm863nn.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wu, Jie. “Nanomagnetism research: benefit from reduced dimensionality and interfaces.” 2010. Web. 11 Apr 2021.

Vancouver:

Wu J. Nanomagnetism research: benefit from reduced dimensionality and interfaces. [Internet] [Thesis]. University of California – Berkeley; 2010. [cited 2021 Apr 11]. Available from: http://www.escholarship.org/uc/item/0cm863nn.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wu J. Nanomagnetism research: benefit from reduced dimensionality and interfaces. [Thesis]. University of California – Berkeley; 2010. Available from: http://www.escholarship.org/uc/item/0cm863nn

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université de Grenoble

14. Savero Torres, Williams. Interplay between pure spin currents and magnetic domain walls : Interaction entre purs courant de spin et parois de domaine magnétiques dans des vannes latéral de spin.

Degree: Docteur es, Physique, 2014, Université de Grenoble

URL: http://www.theses.fr/2014GRENY084

►

Ce manuscrit est basé sur l'étude de l'interaction entre des purs courants de spin et parois de domaines magnétiques. Cet étude a été divisée en… (more)

Subjects/Keywords: Nanomagnétisme; Transport electronique dependant du spin; Magnetoresistance; Nanomagnetism; Spin dependant electronic transport; Magnetoresistance; 530

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APA (6^th Edition):

Savero Torres, W. (2014). Interplay between pure spin currents and magnetic domain walls : Interaction entre purs courant de spin et parois de domaine magnétiques dans des vannes latéral de spin. (Doctoral Dissertation). Université de Grenoble. Retrieved from http://www.theses.fr/2014GRENY084

Chicago Manual of Style (16^th Edition):

Savero Torres, Williams. “Interplay between pure spin currents and magnetic domain walls : Interaction entre purs courant de spin et parois de domaine magnétiques dans des vannes latéral de spin.” 2014. Doctoral Dissertation, Université de Grenoble. Accessed April 11, 2021. http://www.theses.fr/2014GRENY084.

MLA Handbook (7^th Edition):

Savero Torres, Williams. “Interplay between pure spin currents and magnetic domain walls : Interaction entre purs courant de spin et parois de domaine magnétiques dans des vannes latéral de spin.” 2014. Web. 11 Apr 2021.

Vancouver:

Savero Torres W. Interplay between pure spin currents and magnetic domain walls : Interaction entre purs courant de spin et parois de domaine magnétiques dans des vannes latéral de spin. [Internet] [Doctoral dissertation]. Université de Grenoble; 2014. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2014GRENY084.

Council of Science Editors:

Savero Torres W. Interplay between pure spin currents and magnetic domain walls : Interaction entre purs courant de spin et parois de domaine magnétiques dans des vannes latéral de spin. [Doctoral Dissertation]. Université de Grenoble; 2014. Available from: http://www.theses.fr/2014GRENY084

Royal Holloway, University of London

15. Corte-León, Héctor. Domain wall spintronics in novel magnetic nanostructures.

Degree: PhD, 2018, Royal Holloway, University of London

URL: https://pure.royalholloway.ac.uk/portal/en/publications/domain-wall-spintronics-in-novel-magnetic-nanostructures(ee147da1-d03d-46a8-be95-811e56ac978a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.792779

► Magnetic domain walls (DWs) could form the basis of potential novel magnetic based memory, logic, and Lab-On-a-Chip devices, with a great potential to increase performance… (more)

▼ Magnetic domain walls (DWs) could form the basis of potential novel magnetic based memory, logic, and Lab-On-a-Chip devices, with a great potential to increase performance and enable new processes. Being DW detection and manipulation the main obstacle to overcome to achieve integration into new devices. The aim of this thesis is to investigate the manipulation and tracking of DWs through electrical measurements, and study the effect of localized magnetic moments on DW dynamics. Study of DW dynamics inside of in-plane magnetization devices is performed using L-shaped magnetic nanostructures. The L-shaped devices are used as a DW trap to study DW tracking using magnetoresistance (MR) measurements. It is shown, through magnetic force microscopy (MFM) imaging, that the L-shaped nanostructures of certain dimensions geometrically constrain the magnetization to four specific remanent states (i.e. referring to the magnetization at the corner of the L-shape: head-to-head DW, tail-to-tail DW, tail-to-head and head-to-tail magnetization), thus allowing the use of L-shaped devices as DW traps. Due to these simple magnetization states and using anisotropic magnetoresistance effect (AMR), which links magnetization with electrical resistance, we demonstrate that it is possible to track the magnetization and identify the magnetic state of the devices by performing MR measurements. To ease detecting the effect of external influences on the DW dynamics, variations of the design of the L-shaped DW traps are tested. MR measurements, in combination with in situ MFM and micromagnetic simulations, demonstrate that square corner L-shaped nanostructures with circular disks at the end of the nanowires show a larger difference between DW pinning/depinning fields, and have a more symmetric behaviour when magnetic field is applied at different angles. Magnetic bead (MB) detection experiments are performed by placing a single superparamagnetic bead near the DW pinning position on top of the L-shaped nanostructure. The placement is done using micromanipulation. The results demonstrate detectable influence of the MB for L-shaped devices with widths below 200 nm. Additionally, simulations demonstrate existence of two DW depinning mechanisms, which appear at different field orientations. In the first depinning mechanism, the DW at the corner remains pinned and is annihilated by another moving DW, hence, no influence of the MB is detected. In the second depinning mechanism, the original DW depins by moving from the corner and, hence, it is affected by the MB. To complement the detection experiments, atomic force microscopy (AFM) probes modified with a MB attached are used. Magnetic scanning gate microscopy (mSGM) is used to move the MB around the L-shaped nanostructure at different heights, and measure the sensing volume of the L-shaped devices. Planar Hall effect (PHE) measurements, perform on hybrid Py/Au junctions demonstrate larger changes in resistance than the analogous AMR-based magnetization tracking techniques. Moreover, by performing mSGM in…

Subjects/Keywords: nanomagnetism; MFM; Magnetic bead; NANOSTRUCTURES; MAGNETISM; Biomedical Engineering; Sensor; domain wall; magneoresistance; SPIN

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APA (6^th Edition):

Corte-León, H. (2018). Domain wall spintronics in novel magnetic nanostructures. (Doctoral Dissertation). Royal Holloway, University of London. Retrieved from https://pure.royalholloway.ac.uk/portal/en/publications/domain-wall-spintronics-in-novel-magnetic-nanostructures(ee147da1-d03d-46a8-be95-811e56ac978a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.792779

Chicago Manual of Style (16^th Edition):

Corte-León, Héctor. “Domain wall spintronics in novel magnetic nanostructures.” 2018. Doctoral Dissertation, Royal Holloway, University of London. Accessed April 11, 2021. https://pure.royalholloway.ac.uk/portal/en/publications/domain-wall-spintronics-in-novel-magnetic-nanostructures(ee147da1-d03d-46a8-be95-811e56ac978a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.792779.

MLA Handbook (7^th Edition):

Corte-León, Héctor. “Domain wall spintronics in novel magnetic nanostructures.” 2018. Web. 11 Apr 2021.

Vancouver:

Corte-León H. Domain wall spintronics in novel magnetic nanostructures. [Internet] [Doctoral dissertation]. Royal Holloway, University of London; 2018. [cited 2021 Apr 11]. Available from: https://pure.royalholloway.ac.uk/portal/en/publications/domain-wall-spintronics-in-novel-magnetic-nanostructures(ee147da1-d03d-46a8-be95-811e56ac978a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.792779.

Council of Science Editors:

Corte-León H. Domain wall spintronics in novel magnetic nanostructures. [Doctoral Dissertation]. Royal Holloway, University of London; 2018. Available from: https://pure.royalholloway.ac.uk/portal/en/publications/domain-wall-spintronics-in-novel-magnetic-nanostructures(ee147da1-d03d-46a8-be95-811e56ac978a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.792779

Universidade Federal de Viçosa

16. Ricardo Lopes da Silva. Spin dynamics in the presence of defects on confined magnetic structures: applications the magnetic nanodisk.

Degree: 2009, Universidade Federal de Viçosa

URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2825

►

Neste trabalho nós investigamos a influência de defeitos artificiais inseridos em nanodiscos magnéticos na dinâmica do núcleo do vórtice. Primeiro consideramos a presença de buracos.… (more)

▼

Neste trabalho nós investigamos a influência de defeitos artificiais inseridos em nanodiscos magnéticos na dinâmica do núcleo do vórtice. Primeiro consideramos a presença de buracos. A dinâmica foi analisada inicialmente na presença de um buraco e depois na presença de dois buracos. No geral, o núcleo cai no defeito mas, na presença de um único buraco, observamos um fenômeno interessantíssimo e pelo que sabemos, ainda não observado, a inversão de polaridade do núcleo do vórtice induzida pela pela interação vórtice-buraco. Este fenômeno ocorre em condições bastantes especiais, tais como o tamanho da cavidade, sua posição e o tamanho do disco. Qualquer mudança na geometria do disco, como a presença de um outro buraco, muda completamente a dinâmica do núcleo, levando a captura do vórtice por um dos defeitos. E importante resaltar que já existem técnicas litográficas capazes de produzir nanodiscos com este tipo de defeito. Nós também analizamos os efeitos de outro tipo de defeito (defeito tipo linha) na dinâmica do vórtice. Estudamos um modelo de nanodisco constituido de dois semi-discos de materiais ferromagnéticos diferentes, ou seja, com constantes de acoplamento diferentes. O principal resultado que encontramos foi que, dependendo da constante de acoplamento que liga os dois meios, a polarização do núcleo do vórtice pode ser dramaticamente e repetidamente invertida pela interface. Cada vez que ocorre a interação do núcleo com a interface uma grande quantidade de ondas de spins são criadas. Até onde sabemos, tal nanodisco com interface ainda não foi fabricado experimentalmente. O movimento do núcleo do vórtice foi investigado através de um modelo bidimensional simples, que imita um material real com defeitos.

In this work we investigate the influence of artificial defects inserted into thin magnetic nanodisks on the vortex core dynamics. First we consider the presence of one and two holes (antidots). In general, the core falls into the hole but, in particular, we would like to remark an interesting phenomenon not yet observed, which is the vortex core switching induced by the vortex-hole interactions. It occurs for the case with only one hole and for very special conditions involving the hole size and position as well as the disk size. Any small deformation in the disk geometry such as the presence of a second antidot changes completely the vortex dynamics and the vortex core eventually falls into one of the defects. After trapped, the vortex center still oscillates with a very high frequency and small amplitude around the defect center. It is important to remark that these kinds of defects can be already artificially produced in magnetic nanodisks by lithographic techniques. We also study the effects of another type of defect (a line defect) on the vortex. It is done by studying a nanodisk possessing two coupled materials with different ferromagnetic exchange constant. The common border line of the two media passes at the disk center dividing the system exactly in two similar semidisks. The main result of this…

Advisors/Committee Members: Silvio da Costa Ferreira Junior, Winder Alexander de Moura Melo, Afrânio Rodrigues Pereira, Sidiney de Andrade Leonel, André Luiz Mota, Antônio Sérgio Teixeira Pires.

Subjects/Keywords: Dinâmica de spins; Vórtices; FISICA DA MATERIA CONDENSADA; Nanomagnetismo; Nanomagnetism; Vortex; Spin dynamics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Silva, R. L. d. (2009). Spin dynamics in the presence of defects on confined magnetic structures: applications the magnetic nanodisk. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2825

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Silva, Ricardo Lopes da. “Spin dynamics in the presence of defects on confined magnetic structures: applications the magnetic nanodisk.” 2009. Thesis, Universidade Federal de Viçosa. Accessed April 11, 2021. http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2825.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Silva, Ricardo Lopes da. “Spin dynamics in the presence of defects on confined magnetic structures: applications the magnetic nanodisk.” 2009. Web. 11 Apr 2021.

Vancouver:

Silva RLd. Spin dynamics in the presence of defects on confined magnetic structures: applications the magnetic nanodisk. [Internet] [Thesis]. Universidade Federal de Viçosa; 2009. [cited 2021 Apr 11]. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2825.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Silva RLd. Spin dynamics in the presence of defects on confined magnetic structures: applications the magnetic nanodisk. [Thesis]. Universidade Federal de Viçosa; 2009. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2825

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Federal de Viçosa

17. Vagson Luiz de Carvalho Santos. Miniaturização de nanomagnetos com estado de vórtice utilizando-se ferromagnetos toroidais.

Degree: 2010, Universidade Federal de Viçosa

URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4934

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O cálculo da energia associada às configurações de magnetização ferromagnética, vórtice e estado cebola são explicitamente computados para a geometria toroidal. A análise dos dados… (more)

Subjects/Keywords: FISICA DA MATERIA CONDENSADA; Nanomagnetismo; Geometria teroidal; Vórtice; Miniaturização; Nanomagnetism; Nanotori geometry; Vortex; Miniaturization

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Santos, V. L. d. C. (2010). Miniaturização de nanomagnetos com estado de vórtice utilizando-se ferromagnetos toroidais. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4934

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Santos, Vagson Luiz de Carvalho. “Miniaturização de nanomagnetos com estado de vórtice utilizando-se ferromagnetos toroidais.” 2010. Thesis, Universidade Federal de Viçosa. Accessed April 11, 2021. http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4934.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Santos, Vagson Luiz de Carvalho. “Miniaturização de nanomagnetos com estado de vórtice utilizando-se ferromagnetos toroidais.” 2010. Web. 11 Apr 2021.

Vancouver:

Santos VLdC. Miniaturização de nanomagnetos com estado de vórtice utilizando-se ferromagnetos toroidais. [Internet] [Thesis]. Universidade Federal de Viçosa; 2010. [cited 2021 Apr 11]. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4934.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Santos VLdC. Miniaturização de nanomagnetos com estado de vórtice utilizando-se ferromagnetos toroidais. [Thesis]. Universidade Federal de Viçosa; 2010. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4934

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cambridge

18. Brennan, Spencer John. Tuning Spin Currents with Ultrathin Heavy Metal Microstructure.

Degree: PhD, 2019, University of Cambridge

URL: https://www.repository.cam.ac.uk/handle/1810/293990https://www.repository.cam.ac.uk/bitstream/1810/293990/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/293990/4/8a8c114e-c2c5-4487-b6bf-125269f2c0c1.zip ; https://www.repository.cam.ac.uk/bitstream/1810/293990/6/SJB%20Thesis%20Hard%20Bound.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/293990/7/SJB%20Thesis%20Hard%20Bound.pdf.jpg

► All-metallic spintronic heterostructures have the ability to generate pure spin currents at low resistance-area products via spin-orbit coupling. Heavy metal/ferromagnet (HM/NM) bilayers are often used… (more)

▼ All-metallic spintronic heterostructures have the ability to generate pure spin currents at low resistance-area products via spin-orbit coupling. Heavy metal/ferromagnet (HM/NM) bilayers are often used in this context to extract key spin-dependent parameters such as the spin Hall angle, 𝜃, and spin diffusion length, 𝜆, of the constituent materials. However, in the ultrathin film limit, morphology is highly sensitive to growth parameters, making consistent extraction of the spin-dependent properties challenging. Although much work has been done to study spin transport in nanodevices, a long-standing controversy in literature remains over quantifying the magnitudes of spin-dependent parameters in highly spin-orbit coupled HMs. Despite growing evidence that spin-dependent properties vary with HM resistivity, a concerted effort to understand the effect of HM microstructure morphology on spin transport in HM|FM bilayers has yet to be made. In this thesis, we investigate the role of ultrathin HM microstructure morphology on spin transport properties within HM|FM bilayers (FM = Co, CoFeB; HM = W, Ta, Ru, Pt). By seeding HM growth with thin metallic buffer layers including Ta and Ru, we are able to tune the growth mode and so morphology of the HM layer. X-ray diffractometry and transmission electron microscopy confirm the good control of HM growth modes through film wetting, continuity, texture and roughness. The subsequently altered electronic properties mediate the coupling of HM morphology to spin transport by impacting resistance and voltage readouts in common electrical spin injection / detection schemes. We probe spin reflection, transmission and accumulation at the HM|FM interface in three such measurement schemes with a systematic set of spin Hall magnetoresistance (SHMR), spin pumping and spin-orbit torque (SOT) effective field measurements on (un)buffered Pt|CoFeB bilayers. We experimentally demonstrate a large enhancement of generated spin currents with SHMR and spin pumping measurements in ultrathin buffered devices, which can be directly correlated to HM microstructure. After extending current magnetoelectronic circuit theory to include the seed layer, we find that spin transport in buffered Pt|CoFeB bilayers can only be well understood when considering HM film morphology through Elliot-Yafet-dominated spin relaxation and intrinsic spin scattering in the Pt layer. By modelling both SHMR and spin pumping data simultaneously following this methodology, the different dependence on 𝜃 in the schemes allows us to estimate a single set of 𝜃 and λ despite drastically different spin signals in buffered Pt|CoFeB layers. We further confirm the domination of intrinsic spin scattering in Pt by measuring near-constant normalised SOT effective fields across the (un)buffered bilayers. The demonstration of the significant effect of HM microstructure morphology on spin current generation in common measurement schemes indicates this work may potentially provide resolution to the widely varying values of 𝜃 and λ reported across…

Subjects/Keywords: spintronics; magnetism; nanomagnetism; solid state physics; microstructure; thin films; sputtering; XRD; XRR; diffractometry; magnetometry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Brennan, S. J. (2019). Tuning Spin Currents with Ultrathin Heavy Metal Microstructure. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/293990https://www.repository.cam.ac.uk/bitstream/1810/293990/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/293990/4/8a8c114e-c2c5-4487-b6bf-125269f2c0c1.zip ; https://www.repository.cam.ac.uk/bitstream/1810/293990/6/SJB%20Thesis%20Hard%20Bound.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/293990/7/SJB%20Thesis%20Hard%20Bound.pdf.jpg

Chicago Manual of Style (16^th Edition):

Brennan, Spencer John. “Tuning Spin Currents with Ultrathin Heavy Metal Microstructure.” 2019. Doctoral Dissertation, University of Cambridge. Accessed April 11, 2021. https://www.repository.cam.ac.uk/handle/1810/293990https://www.repository.cam.ac.uk/bitstream/1810/293990/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/293990/4/8a8c114e-c2c5-4487-b6bf-125269f2c0c1.zip ; https://www.repository.cam.ac.uk/bitstream/1810/293990/6/SJB%20Thesis%20Hard%20Bound.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/293990/7/SJB%20Thesis%20Hard%20Bound.pdf.jpg.

MLA Handbook (7^th Edition):

Brennan, Spencer John. “Tuning Spin Currents with Ultrathin Heavy Metal Microstructure.” 2019. Web. 11 Apr 2021.

Vancouver:

Brennan SJ. Tuning Spin Currents with Ultrathin Heavy Metal Microstructure. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Apr 11]. Available from: https://www.repository.cam.ac.uk/handle/1810/293990https://www.repository.cam.ac.uk/bitstream/1810/293990/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/293990/4/8a8c114e-c2c5-4487-b6bf-125269f2c0c1.zip ; https://www.repository.cam.ac.uk/bitstream/1810/293990/6/SJB%20Thesis%20Hard%20Bound.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/293990/7/SJB%20Thesis%20Hard%20Bound.pdf.jpg.

Council of Science Editors:

Brennan SJ. Tuning Spin Currents with Ultrathin Heavy Metal Microstructure. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://www.repository.cam.ac.uk/handle/1810/293990https://www.repository.cam.ac.uk/bitstream/1810/293990/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/293990/4/8a8c114e-c2c5-4487-b6bf-125269f2c0c1.zip ; https://www.repository.cam.ac.uk/bitstream/1810/293990/6/SJB%20Thesis%20Hard%20Bound.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/293990/7/SJB%20Thesis%20Hard%20Bound.pdf.jpg

Virginia Commonwealth University

19. Sampath, Vimal G. ULTRA–LOW POWER STRAINTRONIC NANOMAGNETIC COMPUTING WITH SAW WAVES: AN EXPERIMENTAL STUDY OF SAW INDUCED MAGNETIZATION SWITCHING AND PROPERTIES OF MAGNETIC NANOSTRUCTURES.

Degree: PhD, Engineering, 2016, Virginia Commonwealth University

URL: https://doi.org/10.25772/883X-H721 ; https://scholarscompass.vcu.edu/etd/4617

► A recent International Technology Roadmap for Semiconductors (ITRS) report (2.0, 2015 edition) has shown that Moore’s law is unlikely to hold beyond 2028. There… (more)

▼ A recent International Technology Roadmap for Semiconductors (ITRS) report (2.0, 2015 edition) has shown that Moore’s law is unlikely to hold beyond 2028. There is a need for alternate devices to replace CMOS based devices, if further miniaturization and high energy efficiency is desired. The goal of this dissertation is to experimentally demonstrate the feasibility of nanomagnetic memory and logic devices that can be clocked with acoustic waves in an extremely energy efficient manner. While clocking nanomagnetic logic by stressing the magnetostrictive layer of a multiferroic logic element with with an electric field applied across the piezoelectric layer is known to be an extremely energy-efficient clocking scheme, stressing every nanomagnet separately requires individual contacts to each one of them that would necessitate cumbersome lithography. On the other hand, if all nanomagnets are stressed simultaneously with a global voltage, it will eliminate the need for individual contacts, but such a global clock makes the architecture non-pipelined (the next input bit cannot be written till the previous bit has completely propagated through the chain) and therefore, unacceptably slow and error prone. Use of global acoustic wave, that has in-built granularity, would offer the best of both worlds. As the crest and the trough propagate in space with a velocity, nanomagnets that find themselves at a crest are stressed in tension while those in the trough are compressed. All other magnets are relaxed (no stress). Thus, all magnets are not stressed simultaneously but are clocked in a sequentially manner, even though the clocking agent is global. Finally, the acoustic wave energy is distributed over billions of nanomagnets it clocks, which results in an extremely small energy cost per bit per nanomagnet. In summary, acoustic clocking of nanomagnets can lead to extremely energy efficient nanomagnetic computing devices while also eliminating the need for complex lithography. The dissertation work focuses on the following two topics: <ol> Acoustic Waves, generated by IDTs fabricated on a piezoelectric lithium niobate substrate, can be utilized to manipulate the magnetization states in elliptical Co nanomagnets. The magnetization switches from its initial single-domain state to a vortex state after SAW stress cycles propagate through the nanomagnets. The vortex states are stable and the magnetization remains in this state until it is ‘reset’ by an external magnetic field. 2. Acoustic Waves can also be utilized to induce 180⁰ magnetization switching in dipole coupled elliptical Co nanomagnets. The magnetization switches from its initial single-domain ‘up’ state to a single-domain ‘down’ state after SAW tensile/compressive stress cycles propagate through the nanomagnets. The switched state is stable and non-volatile. These results show the effective implementation of a Boolean NOT gate. </ol> Ultimately, the advantage of this… Advisors/Committee Members: Jayasimha Atulasimha.

Subjects/Keywords: Nanomagnetism; SAW; FMR; Nanomagnetic Logic; Electromagnetics and Photonics; Electronic Devices and Semiconductor Manufacturing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sampath, V. G. (2016). ULTRA–LOW POWER STRAINTRONIC NANOMAGNETIC COMPUTING WITH SAW WAVES: AN EXPERIMENTAL STUDY OF SAW INDUCED MAGNETIZATION SWITCHING AND PROPERTIES OF MAGNETIC NANOSTRUCTURES. (Doctoral Dissertation). Virginia Commonwealth University. Retrieved from https://doi.org/10.25772/883X-H721 ; https://scholarscompass.vcu.edu/etd/4617

Chicago Manual of Style (16^th Edition):

Sampath, Vimal G. “ULTRA–LOW POWER STRAINTRONIC NANOMAGNETIC COMPUTING WITH SAW WAVES: AN EXPERIMENTAL STUDY OF SAW INDUCED MAGNETIZATION SWITCHING AND PROPERTIES OF MAGNETIC NANOSTRUCTURES.” 2016. Doctoral Dissertation, Virginia Commonwealth University. Accessed April 11, 2021. https://doi.org/10.25772/883X-H721 ; https://scholarscompass.vcu.edu/etd/4617.

MLA Handbook (7^th Edition):

Sampath, Vimal G. “ULTRA–LOW POWER STRAINTRONIC NANOMAGNETIC COMPUTING WITH SAW WAVES: AN EXPERIMENTAL STUDY OF SAW INDUCED MAGNETIZATION SWITCHING AND PROPERTIES OF MAGNETIC NANOSTRUCTURES.” 2016. Web. 11 Apr 2021.

Vancouver:

Sampath VG. ULTRA–LOW POWER STRAINTRONIC NANOMAGNETIC COMPUTING WITH SAW WAVES: AN EXPERIMENTAL STUDY OF SAW INDUCED MAGNETIZATION SWITCHING AND PROPERTIES OF MAGNETIC NANOSTRUCTURES. [Internet] [Doctoral dissertation]. Virginia Commonwealth University; 2016. [cited 2021 Apr 11]. Available from: https://doi.org/10.25772/883X-H721 ; https://scholarscompass.vcu.edu/etd/4617.

Council of Science Editors:

Sampath VG. ULTRA–LOW POWER STRAINTRONIC NANOMAGNETIC COMPUTING WITH SAW WAVES: AN EXPERIMENTAL STUDY OF SAW INDUCED MAGNETIZATION SWITCHING AND PROPERTIES OF MAGNETIC NANOSTRUCTURES. [Doctoral Dissertation]. Virginia Commonwealth University; 2016. Available from: https://doi.org/10.25772/883X-H721 ; https://scholarscompass.vcu.edu/etd/4617

20. Ευταξίας, Ευθύμιος. Μελέτη της μαγνητικής συμπεριφοράς νανοσωματιδίων με μορφολογία σιδηρομαγνητικού πυρήνα αντισιδηρομαγνητικού φλοιού.

Degree: 2009, University of Patras

URL: http://nemertes.lis.upatras.gr/jspui/handle/10889/2008

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Τα τελευταία χρόνια υπάρχει εκτεταμένη πειραματική και θεωρητική μελέτη στην περιοχή των νανοσωματιδίων διότι βρίσκουν εφαρμογές σαν μέσα μαγνητικής εγγραφής και αποθήκευσης πληροφοριών και πιο… (more)

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Τα τελευταία χρόνια υπάρχει εκτεταμένη πειραματική και θεωρητική μελέτη στην περιοχή των νανοσωματιδίων διότι βρίσκουν εφαρμογές σαν μέσα μαγνητικής εγγραφής και αποθήκευσης πληροφοριών και πιο πρόσφατα στην ιατρική. Στόχος των ερευνών είναι να κατασκευαστούν όσο το δυνατό μικρότερα σε μέγεθος νανοσωματίδια, στα οποία όμως οι μαγνητικές ιδιότητες να είναι σταθερές σε θερμοκρασία δωματίου, δηλαδή με μεγάλη ανισοτροπία. Τα σύνθετα νανοσωματίδια με μορφολογία σιδηρομαγνητικού πυρήνα/αντισιδηρομαγνητικού φλοιού εμφανίζουν μία επιπλέον ανισοτροπία την ανισοτροπία ανταλλαγής η οποία τα καθιστά θερμικά σταθερά σε μικρό μέγεθος. Στην παρούσα εργασία χρησιμοποιήθηκε η τεχνική Μetropolis Monte Carlo για την μελέτη της μαγνητικής συμπεριφοράς νανοσωματιδίων με μορφολογία πυρήνα/φλοιού τα οποία εμφανίζουν την ανισοτροπία ανταλλαγής. Η τεχνική αυτή έχει το πλεονέκτημα ότι μπορεί να περιλάβει στους υπολογισμούς τις λεπτομέρειες της μικροδομής του συστήματος και την θερμοκρασία. Στόχος της εργασίας μας ήταν με την ανάπτυξη κατάλληλου θεωρητικού μοντέλου να μελετηθεί ο μηχανισμός που προκαλεί την εμφάνιση της ανισοτροπίας ανταλλαγής και οι παράγοντες που επηρεάζουν τόσο την εμφάνιση της όσο και την ισχύ της. Βρήκαμε ότι η ανισοτροπία ανταλλαγής η οποία επάγεται από την αλληλεπίδραση ανταλλαγής κατά μήκος της σιδηρομαγνητική/αντισιδηρομαγνητική διεπιφάνειας οφείλεται στην ύπαρξη μη αντισταθμισμένων μαγνητικών ροπών στην διεπιφάνεια μεταξύ σιδηρομαγνητικού πυρήνα του νανοσωματιδίου και αντισιδηρομαγνητικού φλοιού και οι παράγοντες που επηρεάζουν το μέγεθος της είναι α)το πάχος του φλοιού, έχουμε εμφάνιση της μετά το δεύτερο στρώμα αντισιδηρομαγνητικού φλοιού β)το μέγεθος της σταθεράς ανταλλαγής στην διεπιφάνεια και λιγότερο στον φλοιό που ενισχύουν το φαινόμενο, γ)το και το είδος της ανισοτροπίας στον φλοιό, είναι πιο έντονη για ανισοτροπία z-άξονα στο φλοιό και δ)από το μέγεθος της ανισοτροπίας της διεπιφάνειας. Ένα άλλο φαινόμενο που συνδέεται με την εμφάνιση της ανισοτροπίας ανταλλαγής είναι η κάθετη μετατόπιση. Δηλαδή η ασσυμετρία του βρόχου υστέρησης των σύνθετων νανοσωματιδίων με μορφολογία πυρήνα φλοιού στον κάθετο άξονα της μαγνήτισης. Οι υπολογισμοί μας έδειξαν ότι σε αντίθεση με την ανισοτροπία ανταλλαγής η κάθετη μετατόπιση οφείλεται στην ύπαρξη του συνολικού αριθμού των μη αντισταθμισμένων μαγνητικών ροπών του φλοιού και όχι μόνο της διεπιφάνειας. Οι υπολογισμοί μας συγκρίθηκαν με πρόσφατα πειραματικά αποτελέσματα, και βρέθηκαν σε πολύ καλή συμφωνία. Επιβεβαιώνοντας ότι οι ανταγωνιστικές αλληλεπιδράσεις που οφείλονται στην ύπαρξη ανταγωνιστικών αλληλεπιδράσεων ανταλλαγής σε σύνθετα νανοσωματίδια με μορφολογία σιδηρομαγνητικού πυρήνα/αντισιδηρομαγνητικού φλοιού είναι υπεύθυνες για τη μεταβολή των μαγνητικών τους ιδιοτήτων σε σχέση με αυτές των σιδηρομαγνητικών νανοσωματιδίων.

The magnetic properties of nanoparticles have been subject of continuously growing interest, driven by fundamental research and technological interest especially in the magnetic recording industry and more…

Advisors/Committee Members: Ζδέτσης, Αριστείδης, Eftaxias, Efthymios, Ζδέτσης, Αριστείδης, Πρίφτης, Γεώργιος, Βραδής, Αλέξανδρος, Κροντηράς, Χριστόφορος, Τροχίδου, Καλλιόπη, Αναστασόπουλος, Δημήτρης, Κουρής, Στυλιανός.

Subjects/Keywords: Νανομαγνητισμός; Νανοσωματίδια; Ανισοτροπία ανταλλαγής; Πεδίο ανταλλαγής; 538.3; Nanomagnetism; Nanoparticles; Exxchange anisotropy; Exchange field

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ευταξίας, �. (2009). Μελέτη της μαγνητικής συμπεριφοράς νανοσωματιδίων με μορφολογία σιδηρομαγνητικού πυρήνα αντισιδηρομαγνητικού φλοιού. (Doctoral Dissertation). University of Patras. Retrieved from http://nemertes.lis.upatras.gr/jspui/handle/10889/2008

Chicago Manual of Style (16^th Edition):

Ευταξίας, Ευθύμιος. “Μελέτη της μαγνητικής συμπεριφοράς νανοσωματιδίων με μορφολογία σιδηρομαγνητικού πυρήνα αντισιδηρομαγνητικού φλοιού.” 2009. Doctoral Dissertation, University of Patras. Accessed April 11, 2021. http://nemertes.lis.upatras.gr/jspui/handle/10889/2008.

MLA Handbook (7^th Edition):

Ευταξίας, Ευθύμιος. “Μελέτη της μαγνητικής συμπεριφοράς νανοσωματιδίων με μορφολογία σιδηρομαγνητικού πυρήνα αντισιδηρομαγνητικού φλοιού.” 2009. Web. 11 Apr 2021.

Vancouver:

Ευταξίας �. Μελέτη της μαγνητικής συμπεριφοράς νανοσωματιδίων με μορφολογία σιδηρομαγνητικού πυρήνα αντισιδηρομαγνητικού φλοιού. [Internet] [Doctoral dissertation]. University of Patras; 2009. [cited 2021 Apr 11]. Available from: http://nemertes.lis.upatras.gr/jspui/handle/10889/2008.

Council of Science Editors:

Ευταξίας �. Μελέτη της μαγνητικής συμπεριφοράς νανοσωματιδίων με μορφολογία σιδηρομαγνητικού πυρήνα αντισιδηρομαγνητικού φλοιού. [Doctoral Dissertation]. University of Patras; 2009. Available from: http://nemertes.lis.upatras.gr/jspui/handle/10889/2008

21. Pham, Van Tuong. Nanostructures ferromagnétiques/non-magnétiques pour la mesure électrique de l'effet Spin Hall et la détection de murs de domaine : Ferromagnetic/nonmagnetic nanostructures for the electrical measurement of the Spin Hall effect and the detection of domain walls.

Degree: Docteur es, Nanophysique, 2017, Université Grenoble Alpes (ComUE)

URL: http://www.theses.fr/2017GREAY026

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Les purs courants de spin peuvent être créés dans des dispositifs latéraux, en utilisant des mesures non-locales dans des vannes de spin latérales, par l’effet… (more)

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Les purs courants de spin peuvent être créés dans des dispositifs latéraux, en utilisant des mesures non-locales dans des vannes de spin latérales, par l’effet Hall de spin ou encore des effets magnétocaloriques. Ils consistent en le flux d'électrons de spin-up dans une direction, et de spin-down dans la direction opposée, de sorte qu’il y ait un flux de moment angulaire sans flux net de charge. Ces propriétés de transport de spin sont étudiés dans des matériaux non-magnétiques, afin de limiter les effets joules ou les effets de champs Oersted, mais surtout pour permettre la création de dispositifs aux nouvelles fonctionnalités et principe de fonctionnement. En outre, l'absorption de courants de spin purs par un élément ferromagnétique est associé au mécanisme de transfert de spin et peuvent exciter des ondes de spin, induire des oscillations magnétiques conduisant à la commutation magnétique. Un sujet relativement indépendant, mais connexe est la manipulation de parois magnétiques (DWS) dans les nanostructures, qui soulève des questions fondamentales liées au mouvement de DW induit par courant, et sous-tend un certain nombre de technologies émergentes. Au cours de cette thèse, l'intention est d'explorer l'interaction entre les DWS et les courants de spin purs. L'idée principale est d'utiliser vannes de spin latérales pour créer et détecter les courants de spin, et des constrictions dans des nanofils de NiFe pour manipuler les DW, nous allons alors montrer comment ceci peut être utilisé pour générer depuis des DWS des courants de spin purs pour détecter efficacement l’effet Hall de spin. Réciproquement, les courants de spin ainsi généré peuvent être utilisés pour détecter très précisément la position ou la configuration micro-magnétique d'un DW.

The bulk effect of the interconversion between charge current and spin current is activated by spin Hall effect (SHE) and its inverse. It is vastly recognized that the SHE originate of the strong spin–orbit coupling in nonmagnetic materials. This thesis is focused on a proposal techniques to characterize SHE and inverse spin Hall effect (ISHE) in the ferromagnetic/nonmagnetic (F/N) nanostructure and electrical detection of magnetic domain walls by using SHE and ISHE. We will briefly give the cornerstones and the basic spintronic concepts, in order to ease the understanding of the work presented in this thesis, and the state-of-the-art of the SHE investigations. In the second part, a technique of F/N nanostructure are proposed and applied to detect the spin Hall angle and spin diffusion length of Pt. Then the technique will be used to characterize the SHE/ISHE in different materials, heavy metal and alloys. The influence of the interfaces in the device will also investigated. In the last of this manuscript, we demonstrate a domain wall (DW) detection method, based on the ability for a ferromagnetic nanowire, in which a DW is pinned, to inject or detect a PSC what can be produced/detected by SHE/ISHE.

Advisors/Committee Members: Attané, Jean-Philippe (thesis director), Vila, Laurent (thesis director).

Subjects/Keywords: Spintronique; Nanomagnétisme; Transport; Effet Spin Hall; Spintronics; Nanomagnetism; Transport; Spin Hall Effect; 530

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pham, V. T. (2017). Nanostructures ferromagnétiques/non-magnétiques pour la mesure électrique de l'effet Spin Hall et la détection de murs de domaine : Ferromagnetic/nonmagnetic nanostructures for the electrical measurement of the Spin Hall effect and the detection of domain walls. (Doctoral Dissertation). Université Grenoble Alpes (ComUE). Retrieved from http://www.theses.fr/2017GREAY026

Chicago Manual of Style (16^th Edition):

Pham, Van Tuong. “Nanostructures ferromagnétiques/non-magnétiques pour la mesure électrique de l'effet Spin Hall et la détection de murs de domaine : Ferromagnetic/nonmagnetic nanostructures for the electrical measurement of the Spin Hall effect and the detection of domain walls.” 2017. Doctoral Dissertation, Université Grenoble Alpes (ComUE). Accessed April 11, 2021. http://www.theses.fr/2017GREAY026.

MLA Handbook (7^th Edition):

Pham, Van Tuong. “Nanostructures ferromagnétiques/non-magnétiques pour la mesure électrique de l'effet Spin Hall et la détection de murs de domaine : Ferromagnetic/nonmagnetic nanostructures for the electrical measurement of the Spin Hall effect and the detection of domain walls.” 2017. Web. 11 Apr 2021.

Vancouver:

Pham VT. Nanostructures ferromagnétiques/non-magnétiques pour la mesure électrique de l'effet Spin Hall et la détection de murs de domaine : Ferromagnetic/nonmagnetic nanostructures for the electrical measurement of the Spin Hall effect and the detection of domain walls. [Internet] [Doctoral dissertation]. Université Grenoble Alpes (ComUE); 2017. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2017GREAY026.

Council of Science Editors:

Pham VT. Nanostructures ferromagnétiques/non-magnétiques pour la mesure électrique de l'effet Spin Hall et la détection de murs de domaine : Ferromagnetic/nonmagnetic nanostructures for the electrical measurement of the Spin Hall effect and the detection of domain walls. [Doctoral Dissertation]. Université Grenoble Alpes (ComUE); 2017. Available from: http://www.theses.fr/2017GREAY026

22. LUA YAN HWEE SUNNY. Study of Spin Configuration of Hexagonal Shaped Ferromagnetic Structures.

Degree: 2009, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/17631

Subjects/Keywords: Vortex; Magnetisation; MFM; SEMPA; FIB; Nanomagnetism

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

SUNNY, L. Y. H. (2009). Study of Spin Configuration of Hexagonal Shaped Ferromagnetic Structures. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/17631

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

SUNNY, LUA YAN HWEE. “Study of Spin Configuration of Hexagonal Shaped Ferromagnetic Structures.” 2009. Thesis, National University of Singapore. Accessed April 11, 2021. http://scholarbank.nus.edu.sg/handle/10635/17631.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

SUNNY, LUA YAN HWEE. “Study of Spin Configuration of Hexagonal Shaped Ferromagnetic Structures.” 2009. Web. 11 Apr 2021.

Vancouver:

SUNNY LYH. Study of Spin Configuration of Hexagonal Shaped Ferromagnetic Structures. [Internet] [Thesis]. National University of Singapore; 2009. [cited 2021 Apr 11]. Available from: http://scholarbank.nus.edu.sg/handle/10635/17631.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

SUNNY LYH. Study of Spin Configuration of Hexagonal Shaped Ferromagnetic Structures. [Thesis]. National University of Singapore; 2009. Available from: http://scholarbank.nus.edu.sg/handle/10635/17631

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université de Grenoble

23. Jal, Emmanuelle. Réflectivité magnétique résonante de rayons X mous : une sonde de la distribution d'aimantation complexe au sein de films minces : Soft X-ray Resonant Magnetic Reflectivity : a probe for complex magnetization distribution in thin films.

Degree: Docteur es, Physique, 2013, Université de Grenoble

URL: http://www.theses.fr/2013GRENY015

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Cette thèse traite de l'étude de films ultra minces de Fe par réflectivité magnétique résonante de rayons X mous (SXRMR). La technique de SXRMR associe… (more)

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Cette thèse traite de l'étude de films ultra minces de Fe par réflectivité magnétique résonante de rayons X mous (SXRMR). La technique de SXRMR associe les effets magnéto-optiques aux propriétés de diffusions des rayons X, ce qui permet sonder les propriétés magnétiques avec une résolution spatiale en profondeur. Un profil magnétique résolu en profondeur est donc dérivé des expériences, permettant d'étudier les effets des interfaces sur l'homogénéité des propriétés magnétiques. Dans un premier temps nous présentons l'étude d'un film mince de Fe sur un substrat vicinal d'Ag(116) recouvert par quinze monocouches d'Au. Cette étude révèle que l'aimantation est augmentée de 20 à 30% dans les deux à trois monocouches proches des interfaces d'Au et d'Ag, quelque soit la température et l'épaisseur de la couche de Fe. Nous avons également mis en évidence une inhomogénéité de la composante hors du plan à basse température pour des échantillons ayant un axe de facile perpendiculaire aux marches : la composante de l'aimantation hors du plan est de plus en plus grande lorsqu'on se rapproche du substrat vicinal d'Ag. Dans un deuxième temps, nous présentons l'étude d'un film mince de six monocouches de Fe sur du Cu(100) et recouvert par une couche d'Au. En utilisant une approche originale de contrainte sur les paramètres magnétiques, nous avons pû mettre en évidence que la dépendance de l'aimantation en fonction de la température n'était pas la même selon la position de la monocouches dans le film mince de Fe, comme prédit théoriquement par Sandratski.

This thesis deals about depth resolved magnetic profile of ultrathin Fe layers studied by soft X-ray Resonant Magnetic Reflectivity (SXRMR). This SXRMR technique combines magneto-optic effects to X-ray scattering allowing to be sensitive to magnetic properties as well as to be depth resolved. For each experiments, the depth resolved magnetic profile found allows to study interfaces effect on the homogeneity of magnetic properties. First, we present the study of a thin film of Fe grown on a vicinal substrate of Ag(116) and covered by fifteen monolayers of Au. This study reveal that the magnetization is enhanced of 20 to 30% int the two to three monolayers near both interfaces, whatever the temperature and the Fe thickness are. We have also discover an inhomogeneity of the magnetic out of plane component at low temperature for sample where the magnetization easy axis is perpendicular to the steps : the magnetic out of plane component is more and more important when we go strait to the vicinal substrate of Ag. Second, we show the study of a thin film of six monolayers of Fe grown on a Cu(100) substrate and covered by a Au layer. Using a new way of strain on magnetic parameter we have highlighted that the temperature dependance of the magnetization is not the same depending ont the position of the monolayer inside the Fe thin film as predicted by the theory of Sandratski.

Advisors/Committee Members: Tonnerre, Jean-Marc (thesis director).

Subjects/Keywords: Nanomagnétisme; Rayonnement synchrotron; Diffraction résonante; Couche minces; Nanomagnetism; Synchrotron radiation; Resonant scattering; Thin layers

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APA (6^th Edition):

Jal, E. (2013). Réflectivité magnétique résonante de rayons X mous : une sonde de la distribution d'aimantation complexe au sein de films minces : Soft X-ray Resonant Magnetic Reflectivity : a probe for complex magnetization distribution in thin films. (Doctoral Dissertation). Université de Grenoble. Retrieved from http://www.theses.fr/2013GRENY015

Chicago Manual of Style (16^th Edition):

Jal, Emmanuelle. “Réflectivité magnétique résonante de rayons X mous : une sonde de la distribution d'aimantation complexe au sein de films minces : Soft X-ray Resonant Magnetic Reflectivity : a probe for complex magnetization distribution in thin films.” 2013. Doctoral Dissertation, Université de Grenoble. Accessed April 11, 2021. http://www.theses.fr/2013GRENY015.

MLA Handbook (7^th Edition):

Jal, Emmanuelle. “Réflectivité magnétique résonante de rayons X mous : une sonde de la distribution d'aimantation complexe au sein de films minces : Soft X-ray Resonant Magnetic Reflectivity : a probe for complex magnetization distribution in thin films.” 2013. Web. 11 Apr 2021.

Vancouver:

Jal E. Réflectivité magnétique résonante de rayons X mous : une sonde de la distribution d'aimantation complexe au sein de films minces : Soft X-ray Resonant Magnetic Reflectivity : a probe for complex magnetization distribution in thin films. [Internet] [Doctoral dissertation]. Université de Grenoble; 2013. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2013GRENY015.

Council of Science Editors:

Jal E. Réflectivité magnétique résonante de rayons X mous : une sonde de la distribution d'aimantation complexe au sein de films minces : Soft X-ray Resonant Magnetic Reflectivity : a probe for complex magnetization distribution in thin films. [Doctoral Dissertation]. Université de Grenoble; 2013. Available from: http://www.theses.fr/2013GRENY015

Washington University in St. Louis

24. Krishna, Hare. Pattern formation and magnetism in pulsed laser-induced self-organized nanostructures from single and bilayer metallic films.

Degree: PhD, Physics, 2010, Washington University in St. Louis

URL: https://openscholarship.wustl.edu/etd/188

► Self-organization via nanosecond pulsed laser melting of thin metal films is attractive as a reliable and low cost method to create surface metallic nanostructures. The… (more)

▼ Self-organization via nanosecond pulsed laser melting of thin metal films is attractive as a reliable and low cost method to create surface metallic nanostructures. The potential applications of these resulting structures are related to their magnetic, optical, plasmonic, and magneto-optical properties, such as in high density magnetic storage, energy harvesting, and sensing. In this dissertation experimental and theoretical mechanisms of nanoscale patterning by dewetting self-organization was explored in nanoscopic thickness single and bilayer metal films. Magnetism in the resulting nanostructures was also explored. Experimental techniques included thin film deposition, laser irradiation, scanning and transmission electron microscopy, atomic force and magnetic force microscopy. A thermodynamic model of dewetting based on comparing the rate of change of free energy to frictional loss via viscous dissipation was developed. From this model the length scale characteristics of the self-organization in single and bilayer metal systems was determined. The model was successfully applied to experimental behavior of pulsed-laser induced dewetting of Ag, as well as for Co, where intrinsic thermocapillary effects influenced dewetting. Another finding was that the metal films show a thickness dependent dewetting morphology. This was investigated in detail for Ag on SiO₂ substrates and it was found that for films less then 9.5 nm, the early stages of dewetting consisted of bicontinuous structures, while above, it consisted of regular sized holes. This observation was consistent with a previously published theoretical argument that morphology was based on the film-thickness dependent location of the minimum in the free energy curvature. In this model, bicontinuous patterns occur for thickness below the curvature minimum, while holes occur above it. For bilayer self-organization, the immiscible metals Ag and Co were investigated on SiO₂ substrates. The thermodynamic theory predicted substantially different length scales for the two bilayer configurations, Ag/Co/SiO₂ and Co/Ag/SiO₂. This behavior was corroborated by experimental measurements based on pulsed laser dewetting. The difference arises due to change in the sign and magnitude of intermolecular forces for the two configurations. The nanoparticles resulting from bilayer self-organization consisted of granular nanostructure with each nanoparticle containing phase separatedl grains of Ag and Co, thus representing nanoscale nanocomposites. Extensive magnetic investigations were performed on hemispherical shaped nanoparticles of elements: Co, Fe, Ni), alloys: FeCo) and composites: CuCo), created by the laser dewetting process. By utilizing magnetic force microscopy technique, the magnetic anisotropy of individual nanoparticles was determined. The most important discovery was a size-dependent single-domain magnetic anisotropy due to which, smaller particles had an in-plane magnetic orientation while larger particles were out-of-plane.… Advisors/Committee Members: Ramki Kalyanaraman.

Subjects/Keywords: Physics, Condensed Matter; Dewetting, Metals, Nanomagnetism

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APA (6^th Edition):

Krishna, H. (2010). Pattern formation and magnetism in pulsed laser-induced self-organized nanostructures from single and bilayer metallic films. (Doctoral Dissertation). Washington University in St. Louis. Retrieved from https://openscholarship.wustl.edu/etd/188

Chicago Manual of Style (16^th Edition):

Krishna, Hare. “Pattern formation and magnetism in pulsed laser-induced self-organized nanostructures from single and bilayer metallic films.” 2010. Doctoral Dissertation, Washington University in St. Louis. Accessed April 11, 2021. https://openscholarship.wustl.edu/etd/188.

MLA Handbook (7^th Edition):

Krishna, Hare. “Pattern formation and magnetism in pulsed laser-induced self-organized nanostructures from single and bilayer metallic films.” 2010. Web. 11 Apr 2021.

Vancouver:

Krishna H. Pattern formation and magnetism in pulsed laser-induced self-organized nanostructures from single and bilayer metallic films. [Internet] [Doctoral dissertation]. Washington University in St. Louis; 2010. [cited 2021 Apr 11]. Available from: https://openscholarship.wustl.edu/etd/188.

Council of Science Editors:

Krishna H. Pattern formation and magnetism in pulsed laser-induced self-organized nanostructures from single and bilayer metallic films. [Doctoral Dissertation]. Washington University in St. Louis; 2010. Available from: https://openscholarship.wustl.edu/etd/188

Universitat de Valencia

25. Baldoví Jachán, José Jaime. Rational design and modelling of f-block molecular nanomagnets .

Degree: 2016, Universitat de Valencia

URL: http://hdl.handle.net/10550/51666

► Los imanes monomoleculares o moléculas imán, por sus siglas en inglés SMMs, han suscitado una gran atención en los últimos años debido a sus extraordinarias… (more)

▼ Los imanes monomoleculares o moléculas imán, por sus siglas en inglés SMMs, han suscitado una gran atención en los últimos años debido a sus extraordinarias propiedades físicas. Los cristales de este tipo de moléculas se caracterizan por presentar relajación lenta de la magnetización a baja temperatura, así como curvas de histeresis magnética. Estas moléculas se encuentran entre las entidades con comportamiento magnético más complejas, mostrando fenómenos cuánticos tales como efecto túnel en la magnetización, coherencia cuántica o interferencia cuántica. Por esto, se han postulado como candidatos prometedores para el diseño de bits cuánticos (qubits) de espín en computación cuántica. La primera generación de estos imanes monomoleculares estaba basada en complejos polinucleares formados por clusters magnéticos metálicos con estados fundamentales de alto espín, siendo el más conocido el complejo formado por doce núcleos de manganeso, cuya fórmula es [Mn12O12(CH3COO)16(H2O)4]. La posibilidad de sintetizar SMMs usando un solo centro magnético (ion lantánido) fue demostrada por Ishikawa en 2003, a partir de complejos ftalocianinato-lantánido (LnPc2). Éstos presentan una estructura de dos pisos donde dos ligandos planos π conjugados (dianión de ftalocianina), girados 45º respecto al otro, encapsulan el centro metálico de la tierra rara, generando una simetría de campo de ligando D4d alrededor del lantánido. Por otro lado, en 2008 en nuestro grupo se caracterizó la segunda familia de SIMs de lantánido a partir de polioxometalatos. Las diferencias en el comportamiento magnético de ambas familias se pudieron relacionar con pequeñas diferencias en las estructuras cristalográficas. Dicho estudio abrió las puertas al diseño racional de estos sistemas teniendo en cuenta las diferencias en anisotropía magnética, que está condicionada por la geometría molecular. La primera parte de este trabajo está centrada en el desarrollo del marco teórico y computacional que se ha utilizado a lo largo de toda la tesis. Cuando se empezó esta investigación, tan solo unos pocos ejemplos de SIMs se habían publicado, por lo que era de imperativa necesidad proporcionar a la comunidad de magnetismo molecular un programa que ayudase a racionalizar qué condiciones debía satisfacer una molécula para exhibir relajación lenta de la magnetización. En este contexto, se desarrolló la principal herramienta de esta tesis, el programa SIMPRE (Single-Ion Magnet PREdiction), que se ha presentado y descrito en el Capítulo 2. En dicho capítulo se ha explicado a manera de tutorial la organización del mismo y se ha puesto como ejemplo un sistema sencillo (un cubo ideal) para ilustrar su uso. El programa está basado en un modelo electrostático de cargas puntuales a partir del cuál se pueden calcular las propiedades espectroscópicas y magnéticas. Esta herramienta es clave para predecir las propiedades estáticas a partir de una estructura molecular determinada, lo cual nos va a permitir guiar la síntesis de nuevos sistemas. En el Capítulo 3 nos enfrentamos por… Advisors/Committee Members: Coronado Miralles, Eugenio (advisor).

Subjects/Keywords: molecular nanomagnetism; computational chemistry; quantum computing; crystal field; lanthanides and actinides; coordination complexes

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Baldoví Jachán, J. J. (2016). Rational design and modelling of f-block molecular nanomagnets . (Doctoral Dissertation). Universitat de Valencia. Retrieved from http://hdl.handle.net/10550/51666

Chicago Manual of Style (16^th Edition):

Baldoví Jachán, José Jaime. “Rational design and modelling of f-block molecular nanomagnets .” 2016. Doctoral Dissertation, Universitat de Valencia. Accessed April 11, 2021. http://hdl.handle.net/10550/51666.

MLA Handbook (7^th Edition):

Baldoví Jachán, José Jaime. “Rational design and modelling of f-block molecular nanomagnets .” 2016. Web. 11 Apr 2021.

Vancouver:

Baldoví Jachán JJ. Rational design and modelling of f-block molecular nanomagnets . [Internet] [Doctoral dissertation]. Universitat de Valencia; 2016. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10550/51666.

Council of Science Editors:

Baldoví Jachán JJ. Rational design and modelling of f-block molecular nanomagnets . [Doctoral Dissertation]. Universitat de Valencia; 2016. Available from: http://hdl.handle.net/10550/51666

26. Araújo, Marcus Vinicíus. Síntese, caracterização e magnetohipertermia de ferritas de manganês Mn1-xAxFe2O4 dopadas com cobre, magnésio ou cobalto.

Degree: 2017, Universidade Federal de Goiás; Programa de Pós-graduação em Fisica (IF); UFG; Brasil; Instituto de Física – IF (RG)

URL: http://repositorio.bc.ufg.br/tede/handle/tede/7742

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Submitted by Franciele Moreira ([email protected]) on 2017-09-11T13:58:47Z No. of bitstreams: 2 Dissertação - Marcus Vinícius Araújo - 2017.pdf: 21442655 bytes, checksum: 3698012eda944b8f418aebe11accbd00 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)

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Made available in DSpace on 2017-09-15T15:45:28Z (GMT). No. of bitstreams: 2 Dissertação - Marcus Vinícius Araújo - 2017.pdf: 21442655 bytes, checksum: 3698012eda944b8f418aebe11accbd00 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-07-12

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES

Nanoparticles based on Mn-ferrite, Mn1−xAxFe2O4, doped with copper, magnesium and cobalt (A = Cu, Mg ou Co) were synthesized by hydrothermal method under pressure, with X varying from 0 to 0, 5. Magnetic fluids stable in physiological conditions were obtained surface-coating the nanoparticle with citric acid. X-ray diffraction confirmed the spinel structure. Energy dispersive spectroscopy (EDS) confirmed the success of the synthesis of the mixed ferrite, where the element composition agreed with the value expected within an error of 10%. Transmission electron microscopy showed sphericalshaped nanoparticles, while magnetization data at room temperature allowed the analysis of the coercivity field (Hc) and the saturation magnetization (Ms). Ms decreased with the increase of X for the Cu and Mg doped samples, while the opposite effect was observed for Co doped nanoparticles. Hc increased the higher the X value for all the samples. The effect on the Cu and Mg-doped ferrites are explained by the increase in particle size. However, the Co-doped samples, showed a diameter increasing the higher X, but Hc also increased. In this case the Hc behavior is explained by the increase concentration of Co and its effect on the magnetic anisotropy which increases for higher Co content. The magnetic hyperthermia efficiency of the magnetic fluids, for all samples, were investigated in a field amplitude ranging from 50 Oe to 170 Oe and frequencies from 110 kHz up to 990 kHz. The hyperthermia efficiency decreased with X increasing, considering the case of 130Oe and 333 kHz, which indicates that at this experimental condition undoped Mnferrite nanoparticles are better for hyperthermia. In most of the samples it was observed that the efficiency scaled with the square of the field amplitude, which is in accordance with Linear Response Theory (LRT). In addition, the hyperthermia frequency dependence study showed a saturation effect, for some samples, at a frequency higher than 600 kHz. The experimental data as function of frequency were susccessfully curve fitted…

Advisors/Committee Members: Bakuzis, Andris Figueirôa, Bakuzis, Andris Figueirôa, Coaquira, José Antônio Huamaní, Santos, Marcus Carrião dos, Silva, Sebastião Willian da, Bufaiçal, Leandro Félix de Sousa.

Subjects/Keywords: Nanomagnetismo; Nanopartículas magnéticas; Hipertermia magnética; Nanomagnetism; Magnetic nanoparticles; Magnetic hyperthermia; FISICA::FISICA GERAL

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Araújo, M. V. (2017). Síntese, caracterização e magnetohipertermia de ferritas de manganês Mn1-xAxFe2O4 dopadas com cobre, magnésio ou cobalto. (Masters Thesis). Universidade Federal de Goiás; Programa de Pós-graduação em Fisica (IF); UFG; Brasil; Instituto de Física – IF (RG). Retrieved from http://repositorio.bc.ufg.br/tede/handle/tede/7742

Chicago Manual of Style (16^th Edition):

Araújo, Marcus Vinicíus. “Síntese, caracterização e magnetohipertermia de ferritas de manganês Mn1-xAxFe2O4 dopadas com cobre, magnésio ou cobalto.” 2017. Masters Thesis, Universidade Federal de Goiás; Programa de Pós-graduação em Fisica (IF); UFG; Brasil; Instituto de Física – IF (RG). Accessed April 11, 2021. http://repositorio.bc.ufg.br/tede/handle/tede/7742.

MLA Handbook (7^th Edition):

Araújo, Marcus Vinicíus. “Síntese, caracterização e magnetohipertermia de ferritas de manganês Mn1-xAxFe2O4 dopadas com cobre, magnésio ou cobalto.” 2017. Web. 11 Apr 2021.

Vancouver:

Araújo MV. Síntese, caracterização e magnetohipertermia de ferritas de manganês Mn1-xAxFe2O4 dopadas com cobre, magnésio ou cobalto. [Internet] [Masters thesis]. Universidade Federal de Goiás; Programa de Pós-graduação em Fisica (IF); UFG; Brasil; Instituto de Física – IF (RG); 2017. [cited 2021 Apr 11]. Available from: http://repositorio.bc.ufg.br/tede/handle/tede/7742.

Council of Science Editors:

Araújo MV. Síntese, caracterização e magnetohipertermia de ferritas de manganês Mn1-xAxFe2O4 dopadas com cobre, magnésio ou cobalto. [Masters Thesis]. Universidade Federal de Goiás; Programa de Pós-graduação em Fisica (IF); UFG; Brasil; Instituto de Física – IF (RG); 2017. Available from: http://repositorio.bc.ufg.br/tede/handle/tede/7742

27. Suelanny Carvalho da Silva. Nanocompósitos à base de Pr2Fe14B/ α - Fe para aplicações térmicas.

Degree: 2012, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29042013-101915/

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Neste trabalho, pós magnéticos nanoestruturados de PrxFe94-xB6 (x = 6, 8, 10 e 12) foram preparados a partir da combinação do processo de hidrogenação, desproporção,… (more)

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Neste trabalho, pós magnéticos nanoestruturados de PrxFe94-xB6 (x = 6, 8, 10 e 12) foram preparados a partir da combinação do processo de hidrogenação, desproporção, dessorção e recombinação (HDDR) e moagem de alta energia entre uma liga em estado bruto de fusão (Pr14Fe80B6) e Fe-α em pó. As nanopartículas produzidas apresentaram propriedades magnéticas e microestruturais comparáveis aos estudos realizados em hipertermia. O tempo ideal para obtenção de nanopartículas magnéticas é de 5 horas (a 900 rpm). Foi constatado que quanto maior o tempo de moagem, maior o percentual de carbono nas partículas (0,05 - 3,43 % C). O carbono é proveniente do ácido oléico adicionado como surfactante na etapa de moagem. Os nanocompósitos obtidos exibiram forças coercivas entre 80 Oe (6,5 kAm-1) e 170 Oe (13,5 kAm-1), e momentos magnéticos variando entre 81 - 129 Am2kg-1. A partir da difração de raios X foram identificadas apenas duas fases em todas as amostras: Fe-α e a fase magnética Pr2Fe14B. Nanopartículas isoladas com diâmetro aproximado de 20nm foram analisadas. Todas as composições estudadas apresentaram aquecimento proveniente da exposição a um campo magnético alternado (f = 222 kHz e Hmax ~3,7 kAm-1) comparáveis aos reportados na literatura. As variações de temperaturas (ΔT) dos pós foram: 51 K referente à composição de Pr6Fe88B6, 41 K para Pr8Fe86B6, 38 K no composto com 10% at. Pr (Pr10Fe84B6) e 34 K em Pr12Fe82B6. As taxas de absorção específicas estimadas foram de 201 Wkg-1 para a composição Pr6Fe88B6, 158 Wkg-1 para a composição Pr8Fe86B6 e 114 Wkg-1 para as composições Pr10Fe84B6 e Pr12Fe82B6.

In this work, PrxFe94-xB6 (x = 6, 8, 10 and 12) nanostructured powders were prepared by a combination of hydrogenation, disproportionation, desorption and recombination (HDDR) process with high energy milling applied to the mixture of an as-cast alloy (Pr14Fe80B6) and α-Fe. The produced nanoparticles showed magnetic properties comparable to those reported in hyperthermia studies. The optimal time to obtain the magnetic nanoparticles is 5 hours (at 900 rpm). It was verified that longer milling times cause an increase in carbon percentage on the particles. The carbon is derived from oleic acid added as a surfactant in the milling step. The nanocomposites exhibit coercive force ranging from 80 Oe (6.5 kAm-1) to 170 Oe (13.5 kAm-1) and magnetic moments in the range of 81 129 Am2kg-1. From the x-ray diffraction analyses, only two phases were found in all samples: α-Fe and the magnetic phase Pr2Fe14B. Individual nanoparticles with diameter of about 20 nm were verified. The samples studied presented heating when exposed to an alternating magnetic field (f = 222 kHz e Hmax ~3.7 kAm-1) comparable to reported in literature. Temperature variations (ΔT) of the powders were: 51 K for Pr6Fe88B6, 41 K for Pr8Fe86B6, 38 K for Pr10Fe84B6 and T = 34 K for Pr12Fe82B6. The specific absorption rates (SARs) of the powders were 201 Wkg-1 for Pr6Fe88B6 composition, 158 Wkg-1 on the composition Pr8Fe86B6, and…

Advisors/Committee Members: Hidetoshi Takiishi, Luís Antonio Genova, Elio Alberto Périgo, Daniel Rodrigues, Paulo Antônio Pereira Wendhausen.

Subjects/Keywords: aquecimento magnético; HDDR; hipertermia; nanocompósitos; nanomagnetismo; HDDR; hyperthermia; nanocomposite; nanomagnetism; thermal applications

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Silva, S. C. d. (2012). Nanocompósitos à base de Pr2Fe14B/ α - Fe para aplicações térmicas. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29042013-101915/

Chicago Manual of Style (16^th Edition):

Silva, Suelanny Carvalho da. “Nanocompósitos à base de Pr2Fe14B/ α - Fe para aplicações térmicas.” 2012. Doctoral Dissertation, University of São Paulo. Accessed April 11, 2021. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29042013-101915/.

MLA Handbook (7^th Edition):

Silva, Suelanny Carvalho da. “Nanocompósitos à base de Pr2Fe14B/ α - Fe para aplicações térmicas.” 2012. Web. 11 Apr 2021.

Vancouver:

Silva SCd. Nanocompósitos à base de Pr2Fe14B/ α - Fe para aplicações térmicas. [Internet] [Doctoral dissertation]. University of São Paulo; 2012. [cited 2021 Apr 11]. Available from: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29042013-101915/.

Council of Science Editors:

Silva SCd. Nanocompósitos à base de Pr2Fe14B/ α - Fe para aplicações térmicas. [Doctoral Dissertation]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29042013-101915/

King Abdullah University of Science and Technology

28. Alawein, Meshal. Circuit Simulation of All-Spin Logic.

Degree: Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division, 2016, King Abdullah University of Science and Technology

URL: http://hdl.handle.net/10754/609600

► With the aggressive scaling of complementary metal-oxide semiconductor (CMOS) nearing an inevitable physical limit and its well-known power crisis, the quest for an alternative/augmenting technology… (more)

▼ With the aggressive scaling of complementary metal-oxide semiconductor (CMOS) nearing an inevitable physical limit and its well-known power crisis, the quest for an alternative/augmenting technology that surpasses the current semiconductor electronics is needed for further technological progress. Spintronic devices emerge as prime candidates for Beyond CMOS era by utilizing the electron spin as an extra degree of freedom to decrease the power consumption and overcome the velocity limit connected with the charge. By using the nonvolatility nature of magnetization along with its direction to represent a bit of information and then manipulating it by spin-polarized currents, routes are opened for combined memory and logic. This would not have been possible without the recent discoveries in the physics of nanomagnetism such as spin-transfer torque (STT) whereby a spin-polarized current can excite magnetization dynamics through the transfer of spin angular momentum. STT have expanded the available means of switching the magnetization of magnetic layers beyond old classical techniques, promising to fulfill the need for a new generation of dense, fast, and nonvolatile logic and storage devices. All-spin logic (ASL) is among the most promising spintronic logic switches due to its low power consumption, logic-in-memory structure, and operation on pure spin currents. The device is based on a lateral nonlocal spin valve and STT switching. It utilizes two nanomagnets (whereby information is stored) that communicate with pure spin currents through a spin-coherent nonmagnetic channel. By using the well-known spin physics and the recently proposed four-component spin circuit formalism, ASL can be thoroughly studied and simulated. Previous attempts to model ASL in the linear and diffusive regime either neglect the dynamic characteristics of transport or do not provide a scalable and robust platform for full micromagnetic simulations and inclusion of other effects like spin Hall effect and spin-orbit torque. In this thesis, we propose an improved stochastic magnetization dynamics/time-dependent spin transport model based on a finite-difference scheme of both the temporal and spatial derivatives to capture the key features of ASL. The approach yields new finite-difference conductance matrices, which, in addition to recovering the steady-state results, captures the dynamic behavior. The new conductance matrices are general in that the discretization framework can be readily applied and extended to other spintronic devices. Also, we provide a stable algorithm that can be used to simulate a generic ASL switch using the developed model. Advisors/Committee Members: Fariborzi, Hossein (advisor), Kosel, Jürgen (committee member), Manchon, Aurelien (committee member).

Subjects/Keywords: Spintronics; All-spin logic; Nanomagnetism; Spin transport; Circuit model; Spin-Transfer Torque

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alawein, M. (2016). Circuit Simulation of All-Spin Logic. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/609600

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Alawein, Meshal. “Circuit Simulation of All-Spin Logic.” 2016. Thesis, King Abdullah University of Science and Technology. Accessed April 11, 2021. http://hdl.handle.net/10754/609600.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Alawein, Meshal. “Circuit Simulation of All-Spin Logic.” 2016. Web. 11 Apr 2021.

Vancouver:

Alawein M. Circuit Simulation of All-Spin Logic. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2016. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/10754/609600.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Alawein M. Circuit Simulation of All-Spin Logic. [Thesis]. King Abdullah University of Science and Technology; 2016. Available from: http://hdl.handle.net/10754/609600

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université de Grenoble

29. Da Col, Sandrine. Parois magnétiques dans les nanofils cylindriques : Magnetic Domain Walls in Cylindrical Nanowires.

Degree: Docteur es, Physique, 2014, Université de Grenoble

URL: http://www.theses.fr/2014GRENY083

►

La richesse de la physique sous-jacente au déplacement de parois magnétiques suscite actuellement un fort intérêt, réhaussé par les possibilités d'applications dans les mémoires magnétiques.Les… (more)

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La richesse de la physique sous-jacente au déplacement de parois magnétiques suscite actuellement un fort intérêt, réhaussé par les possibilités d'applications dans les mémoires magnétiques.Les nanobandes fabriquées par lithographie constituent la quasi-totalité des systèmes dans lesquels les parois sont étudiées.Une géométrie cylindrique implique cependant des structures et dynamiques de parois qui se démarqueraient de celles observées dans les nanobandes et résoudraient notamment les limitations des vitesses de propagation observées.Leur procédé d'élaboration, fabrication d'une membrane nanoporeuse et remplissage électrolytique des pores, permet d'obtenir des fils auto-organisés en réseau, de grand rapport d'aspect et de faible distribution en diamètre.Malgré leur intérêt indéniable, peu d'études ont été consacrées aux parois dans ces systèmes cylindriques.Cette thèse se propose donc de contribuer au sujet.Une partie de cette thèse a été consacrée à la mise en place et au développement de certaines étapes du procédé de fabrication : réduction de la porosité des membranes, modulation du diamètre des pores, dépôt électrolytique d'un alliage magnétique.Ces ajustements de la géométrie et de la structure des fils ont permis d'étudier plusieurs aspects des parois dans les nanofils.Dans un premier temps, une méthode expérimentale a été proposée pour réduire les interactions magnétostatiques qui gêneraient la propagation des parois dans les réseaux denses de fils.Son efficacité a été démontrée sur le mécanisme de nucléation des parois qui intervient en bout de fil lors du renversement de l'aimantation, en mesurant les cycles d'hystérésis des réseaux de fils.D'autres mécanismes de piégeage ont ensuite été mis en évidence par l'analyse de courbes de première aimantation mesurées suite à la nucléation contrôlée de parois.Les champs de propagation de l'ordre de quelques milliteslas, mesurés par microscopie à force magnétique sur des fils individuels, ouvrent cependant la voie aux études dynamiques dans ces systèmes.Enfin, l'observation de la structure interne des parois par dichroïsme circulaire magnétique de rayons X en microscopie de photoémission d'électrons (PEEM-XMCD) a permis de mettre en évidence les deux types de parois prédits par la théorie et les simulations, pour lesquels des mobilités très différentes sont attendues.

The underlying physics of magnetic domain wall motion is currently arousing a strong interest, enhanced by the possibilities of applications into magnetic memories.Domain walls are mostly studied in nanostripes made by lithography.Nevertheless, a cylindrical geometry would involve domain walls with different structures and dynamical behaviors that could resolve issues, such as the speed limitation observed in nanostripes.Their elaboration process, via the fabrication of nanoporous template followed by the electrolytic filling of the pores, leads to self-organized nanowires with high aspect ratio and weak distribution in diameter.In spite of their undeniable interest, for now only very few domain…

Advisors/Committee Members: Fruchart, Olivier (thesis director).

Subjects/Keywords: Nanomagnétisme; Paroi magnétique; Nanofils; Enregistrement magnétique; Electronique de spin; Nanomagnetism; Magnetic domain wall; Nanowires; Magnetic recording; Spintronics; 530

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Da Col, S. (2014). Parois magnétiques dans les nanofils cylindriques : Magnetic Domain Walls in Cylindrical Nanowires. (Doctoral Dissertation). Université de Grenoble. Retrieved from http://www.theses.fr/2014GRENY083

Chicago Manual of Style (16^th Edition):

Da Col, Sandrine. “Parois magnétiques dans les nanofils cylindriques : Magnetic Domain Walls in Cylindrical Nanowires.” 2014. Doctoral Dissertation, Université de Grenoble. Accessed April 11, 2021. http://www.theses.fr/2014GRENY083.

MLA Handbook (7^th Edition):

Da Col, Sandrine. “Parois magnétiques dans les nanofils cylindriques : Magnetic Domain Walls in Cylindrical Nanowires.” 2014. Web. 11 Apr 2021.

Vancouver:

Da Col S. Parois magnétiques dans les nanofils cylindriques : Magnetic Domain Walls in Cylindrical Nanowires. [Internet] [Doctoral dissertation]. Université de Grenoble; 2014. [cited 2021 Apr 11]. Available from: http://www.theses.fr/2014GRENY083.

Council of Science Editors:

Da Col S. Parois magnétiques dans les nanofils cylindriques : Magnetic Domain Walls in Cylindrical Nanowires. [Doctoral Dissertation]. Université de Grenoble; 2014. Available from: http://www.theses.fr/2014GRENY083

Texas A&M University

30. Reaves, Kelley Thomas. An Experimental Study of Mn12-Family Molecular Magnets in Isolation with High Spatial Resolution.

Degree: PhD, Materials Science and Engineering, 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/154223

► I report my studies of Mn12O12(C6H5COO)16(H2O)4, which will be referred to as Mn12-Ph, a single molecule magnet, on Cu(111) and HOPG (highly oriented pyrolytic graphite)… (more)

Subjects/Keywords: Single Molecule Magnet; nanomagnetism; low temperature physics; surface chemistry; thin film device; STM; AFM; SEM; EDX; SQUID

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Reaves, K. T. (2014). An Experimental Study of Mn12-Family Molecular Magnets in Isolation with High Spatial Resolution. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/154223

Chicago Manual of Style (16^th Edition):

Reaves, Kelley Thomas. “An Experimental Study of Mn12-Family Molecular Magnets in Isolation with High Spatial Resolution.” 2014. Doctoral Dissertation, Texas A&M University. Accessed April 11, 2021. http://hdl.handle.net/1969.1/154223.

MLA Handbook (7^th Edition):

Reaves, Kelley Thomas. “An Experimental Study of Mn12-Family Molecular Magnets in Isolation with High Spatial Resolution.” 2014. Web. 11 Apr 2021.

Vancouver:

Reaves KT. An Experimental Study of Mn12-Family Molecular Magnets in Isolation with High Spatial Resolution. [Internet] [Doctoral dissertation]. Texas A&M University; 2014. [cited 2021 Apr 11]. Available from: http://hdl.handle.net/1969.1/154223.

Council of Science Editors:

Reaves KT. An Experimental Study of Mn12-Family Molecular Magnets in Isolation with High Spatial Resolution. [Doctoral Dissertation]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/154223

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