subject:(magnetization)

University of Manitoba

1. Anthonys, Gehan. Application of translational addition theorems to the study of the magnetization of systems of ferromagnetic spheres.

Degree: Electrical and Computer Engineering, 2014, University of Manitoba

URL: http://hdl.handle.net/1993/23893

► The main objective of this research is the study of the magnetization of ferromagnetic spheres in the presence of external magnetic fields. The exact analytical… (more)

Subjects/Keywords: Magnetization

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APA (6^th Edition):

Anthonys, G. (2014). Application of translational addition theorems to the study of the magnetization of systems of ferromagnetic spheres. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/23893

Chicago Manual of Style (16^th Edition):

Anthonys, Gehan. “Application of translational addition theorems to the study of the magnetization of systems of ferromagnetic spheres.” 2014. Masters Thesis, University of Manitoba. Accessed August 15, 2018. http://hdl.handle.net/1993/23893.

MLA Handbook (7^th Edition):

Anthonys, Gehan. “Application of translational addition theorems to the study of the magnetization of systems of ferromagnetic spheres.” 2014. Web. 15 Aug 2018.

Vancouver:

Anthonys G. Application of translational addition theorems to the study of the magnetization of systems of ferromagnetic spheres. [Internet] [Masters thesis]. University of Manitoba; 2014. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/1993/23893.

Council of Science Editors:

Anthonys G. Application of translational addition theorems to the study of the magnetization of systems of ferromagnetic spheres. [Masters Thesis]. University of Manitoba; 2014. Available from: http://hdl.handle.net/1993/23893

Montana State University

2. Gilmore, Keith. Precession damping in itinerant ferromagnets.

Degree: 2007, Montana State University

URL: http://scholarworks.montana.edu/xmlui/handle/1/1336

► The energy of the spin system changes by two mechanism: the energies of the states change and transitions to excited states occur. The first mechanism… (more)

Subjects/Keywords: Magnetization.

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APA (6^th Edition):

Gilmore, K. (2007). Precession damping in itinerant ferromagnets. (Thesis). Montana State University. Retrieved from http://scholarworks.montana.edu/xmlui/handle/1/1336

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):

Gilmore, Keith. “Precession damping in itinerant ferromagnets.” 2007. Thesis, Montana State University. Accessed August 15, 2018. http://scholarworks.montana.edu/xmlui/handle/1/1336.

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

MLA Handbook (7^th Edition):

Gilmore, Keith. “Precession damping in itinerant ferromagnets.” 2007. Web. 15 Aug 2018.

Vancouver:

Gilmore K. Precession damping in itinerant ferromagnets. [Internet] [Thesis]. Montana State University; 2007. [cited 2018 Aug 15]. Available from: http://scholarworks.montana.edu/xmlui/handle/1/1336.

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

Council of Science Editors:

Gilmore K. Precession damping in itinerant ferromagnets. [Thesis]. Montana State University; 2007. Available from: http://scholarworks.montana.edu/xmlui/handle/1/1336

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

McGill University

3. Srivastava, Vishnu Chandra. Effects of pressure on magnetic phase transitions.

Degree: PhD, Department of Physics, 1969, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile73919.pdf

Subjects/Keywords: Magnetization

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APA (6^th Edition):

Srivastava, V. C. (1969). Effects of pressure on magnetic phase transitions. (Doctoral Dissertation). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile73919.pdf

Chicago Manual of Style (16^th Edition):

Srivastava, Vishnu Chandra. “Effects of pressure on magnetic phase transitions.” 1969. Doctoral Dissertation, McGill University. Accessed August 15, 2018. http://digitool.library.mcgill.ca/thesisfile73919.pdf.

MLA Handbook (7^th Edition):

Srivastava, Vishnu Chandra. “Effects of pressure on magnetic phase transitions.” 1969. Web. 15 Aug 2018.

Vancouver:

Srivastava VC. Effects of pressure on magnetic phase transitions. [Internet] [Doctoral dissertation]. McGill University; 1969. [cited 2018 Aug 15]. Available from: http://digitool.library.mcgill.ca/thesisfile73919.pdf.

Council of Science Editors:

Srivastava VC. Effects of pressure on magnetic phase transitions. [Doctoral Dissertation]. McGill University; 1969. Available from: http://digitool.library.mcgill.ca/thesisfile73919.pdf

University of Minnesota

4. Molinek, Frank. The magnetization and relative paleointensity of experimentally deposited natural sediments.

Degree: MS, Earth Sciences, 2017, University of Minnesota

URL: http://hdl.handle.net/11299/190589

► The magnetization of a sediment occurs when ferromagnetic detrital particles align with a depositional magnetic field. The geomagnetic field can be approximated by a dipole… (more)

Subjects/Keywords: anisotropy; magnetization; paleointensity; sediments

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APA (6^th Edition):

Molinek, F. (2017). The magnetization and relative paleointensity of experimentally deposited natural sediments. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/190589

Chicago Manual of Style (16^th Edition):

Molinek, Frank. “The magnetization and relative paleointensity of experimentally deposited natural sediments.” 2017. Masters Thesis, University of Minnesota. Accessed August 15, 2018. http://hdl.handle.net/11299/190589.

MLA Handbook (7^th Edition):

Molinek, Frank. “The magnetization and relative paleointensity of experimentally deposited natural sediments.” 2017. Web. 15 Aug 2018.

Vancouver:

Molinek F. The magnetization and relative paleointensity of experimentally deposited natural sediments. [Internet] [Masters thesis]. University of Minnesota; 2017. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/11299/190589.

Council of Science Editors:

Molinek F. The magnetization and relative paleointensity of experimentally deposited natural sediments. [Masters Thesis]. University of Minnesota; 2017. Available from: http://hdl.handle.net/11299/190589

Georgia Tech

5. Copeland, John Alexander. First order Green function theory of the Heisenberg ferromagnet.

Degree: PhD, Physics, 1965, Georgia Tech

URL: http://hdl.handle.net/1853/29346

Subjects/Keywords: Magnetization; Ferromagnetism

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APA (6^th Edition):

Copeland, J. A. (1965). First order Green function theory of the Heisenberg ferromagnet. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/29346

Chicago Manual of Style (16^th Edition):

Copeland, John Alexander. “First order Green function theory of the Heisenberg ferromagnet.” 1965. Doctoral Dissertation, Georgia Tech. Accessed August 15, 2018. http://hdl.handle.net/1853/29346.

MLA Handbook (7^th Edition):

Copeland, John Alexander. “First order Green function theory of the Heisenberg ferromagnet.” 1965. Web. 15 Aug 2018.

Vancouver:

Copeland JA. First order Green function theory of the Heisenberg ferromagnet. [Internet] [Doctoral dissertation]. Georgia Tech; 1965. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/1853/29346.

Council of Science Editors:

Copeland JA. First order Green function theory of the Heisenberg ferromagnet. [Doctoral Dissertation]. Georgia Tech; 1965. Available from: http://hdl.handle.net/1853/29346

Boston University

6. Maier, Mihaela. Magnetization transfer effect on T1 relaxometry on 1.5T vs. 3T.

Degree: MS, Bioimaging, 2017, Boston University

URL: http://hdl.handle.net/2144/26732

► PURPOSE: To assess the variability of incidental magnetization transfer effect (MT) by the number of slices and the magnetic field strength. METHODS: Various magnetic resonance… (more)

Subjects/Keywords: Medical imaging; Relaxometry; Magnetization transfer

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APA (6^th Edition):

Maier, M. (2017). Magnetization transfer effect on T1 relaxometry on 1.5T vs. 3T. (Masters Thesis). Boston University. Retrieved from http://hdl.handle.net/2144/26732

Chicago Manual of Style (16^th Edition):

Maier, Mihaela. “Magnetization transfer effect on T1 relaxometry on 1.5T vs. 3T.” 2017. Masters Thesis, Boston University. Accessed August 15, 2018. http://hdl.handle.net/2144/26732.

MLA Handbook (7^th Edition):

Maier, Mihaela. “Magnetization transfer effect on T1 relaxometry on 1.5T vs. 3T.” 2017. Web. 15 Aug 2018.

Vancouver:

Maier M. Magnetization transfer effect on T1 relaxometry on 1.5T vs. 3T. [Internet] [Masters thesis]. Boston University; 2017. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/2144/26732.

Council of Science Editors:

Maier M. Magnetization transfer effect on T1 relaxometry on 1.5T vs. 3T. [Masters Thesis]. Boston University; 2017. Available from: http://hdl.handle.net/2144/26732

Kansas State University

7. Bornemeier, Dwight Daniel. Determination of the longitudinal magnetization curves of polarized nickel-iron wires under torsional stress.

Degree: 1960, Kansas State University

URL: http://hdl.handle.net/2097/18517

Subjects/Keywords: Magnetization; Ferromagnetism

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APA (6^th Edition):

Bornemeier, D. D. (1960). Determination of the longitudinal magnetization curves of polarized nickel-iron wires under torsional stress. (Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/18517

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):

Bornemeier, Dwight Daniel. “Determination of the longitudinal magnetization curves of polarized nickel-iron wires under torsional stress.” 1960. Thesis, Kansas State University. Accessed August 15, 2018. http://hdl.handle.net/2097/18517.

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

MLA Handbook (7^th Edition):

Bornemeier, Dwight Daniel. “Determination of the longitudinal magnetization curves of polarized nickel-iron wires under torsional stress.” 1960. Web. 15 Aug 2018.

Vancouver:

Bornemeier DD. Determination of the longitudinal magnetization curves of polarized nickel-iron wires under torsional stress. [Internet] [Thesis]. Kansas State University; 1960. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/2097/18517.

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

Council of Science Editors:

Bornemeier DD. Determination of the longitudinal magnetization curves of polarized nickel-iron wires under torsional stress. [Thesis]. Kansas State University; 1960. Available from: http://hdl.handle.net/2097/18517

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

8. Gunawardana, Hiruni. Petrophysical Investigations of the Marathon Cu-PGE Deposit, Marathon, ON.

Degree: 2017, University of Western Ontario

URL: https://ir.lib.uwo.ca/etd/4946

► Drill core samples obtained from four mineralized zones of the Marathon Cu-PGE deposit in the Coldwell igneous complex have been investigated for their petrophysical characteristics.… (more)

Subjects/Keywords: induced magnetization; remanent magnetization; AMS; anisotropy; petrofabric; Geology; Geophysics and Seismology

11 more images…

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APA (6^th Edition):

Gunawardana, H. (2017). Petrophysical Investigations of the Marathon Cu-PGE Deposit, Marathon, ON. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/4946

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):

Gunawardana, Hiruni. “Petrophysical Investigations of the Marathon Cu-PGE Deposit, Marathon, ON.” 2017. Thesis, University of Western Ontario. Accessed August 15, 2018. https://ir.lib.uwo.ca/etd/4946.

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

MLA Handbook (7^th Edition):

Gunawardana, Hiruni. “Petrophysical Investigations of the Marathon Cu-PGE Deposit, Marathon, ON.” 2017. Web. 15 Aug 2018.

Vancouver:

Gunawardana H. Petrophysical Investigations of the Marathon Cu-PGE Deposit, Marathon, ON. [Internet] [Thesis]. University of Western Ontario; 2017. [cited 2018 Aug 15]. Available from: https://ir.lib.uwo.ca/etd/4946.

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

Council of Science Editors:

Gunawardana H. Petrophysical Investigations of the Marathon Cu-PGE Deposit, Marathon, ON. [Thesis]. University of Western Ontario; 2017. Available from: https://ir.lib.uwo.ca/etd/4946

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

Kent State University

9. Gyawali, Parshu Ram. Study of Doping Dependence of the Vortex Regime and Magnetic Response in an Underdoped High Temperature Superconductors.

Degree: PhD, College of Arts and Sciences / Department of Physics, 2009, Kent State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=kent1259609327

► This dissertation is a study of praseodymium (Pr) doped YBCO single crystals in the underdoped regime starting from very close to the critical doping.… (more)

Subjects/Keywords: Physics; Magnetization; Superconductors; Cu3; magnetic field

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APA (6^th Edition):

Gyawali, P. R. (2009). Study of Doping Dependence of the Vortex Regime and Magnetic Response in an Underdoped High Temperature Superconductors. (Doctoral Dissertation). Kent State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=kent1259609327

Chicago Manual of Style (16^th Edition):

Gyawali, Parshu Ram. “Study of Doping Dependence of the Vortex Regime and Magnetic Response in an Underdoped High Temperature Superconductors.” 2009. Doctoral Dissertation, Kent State University. Accessed August 15, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1259609327.

MLA Handbook (7^th Edition):

Gyawali, Parshu Ram. “Study of Doping Dependence of the Vortex Regime and Magnetic Response in an Underdoped High Temperature Superconductors.” 2009. Web. 15 Aug 2018.

Vancouver:

Gyawali PR. Study of Doping Dependence of the Vortex Regime and Magnetic Response in an Underdoped High Temperature Superconductors. [Internet] [Doctoral dissertation]. Kent State University; 2009. [cited 2018 Aug 15]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=kent1259609327.

Council of Science Editors:

Gyawali PR. Study of Doping Dependence of the Vortex Regime and Magnetic Response in an Underdoped High Temperature Superconductors. [Doctoral Dissertation]. Kent State University; 2009. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=kent1259609327

Louisiana State University

10. Schurr, Ryan Nicholas. Z-Spectral Modeling for Magnetization Transfer Ratio Asymmetry Calculations in Chemical Exchange Saturation Transfer MRI at 3 Tesla.

Degree: MS, Physical Sciences and Mathematics, 2015, Louisiana State University

URL: etd-06182015-155915 ; https://digitalcommons.lsu.edu/gradschool_theses/2661

► Chemical exchange saturation transfer (CEST) and magnetization transfer (MT) are types of magnetic resonance imaging (MRI) experiments in which contrast is based on the transfer… (more)

▼ Chemical exchange saturation transfer (CEST) and magnetization transfer (MT) are types of magnetic resonance imaging (MRI) experiments in which contrast is based on the transfer of magnetization from selectively saturated solute or macromolecular protons to bulk water protons. These processes offer insight into the chemical composition of tissue and are quantified by the asymmetry of the magnetization transfer ratio (MTRasym). This study was to develop a Z-spectral curve fitting procedure based on the underlying physics of CEST-MRI from which MTRasym values can be calculated and applied to distinguish healthy tissue from cancer. Z-spectra were collected from CEST-MR images of a phantom. The data were fit to both the proposed model which separately fits the upfield and downfield regions of the Z-spectra, and two polynomial models from literature. A preferred model was identified using the small sample bias-corrected Akaike’s Information Criterion (AICc). Z-spectra were collected from CEST-MR images of prostate cancer patients and fit with the same models; the preferred model was selected using the AICc. CEST-MR images of bladder cancer patients were acquired and the Z-spectra were fit with the preferred model identified from the phantom images. MTRasym was calculated at frequency offsets of 3.5 ppm and 2.0 ppm to determine if these quantities were capable of distinguishing normal bladder wall (NBW) from bladder cancer. The proposed fitting model with a 5th order polynomial for the downfield region was the preferred curve fitting model by the AICc model selection procedure for the phantom while a 6th order polynomial was preferred for the prostate cancer Z-spectra. MTRasym(2.0 ppm) values calculated from the bladder cancer Z-spectra did not differ significantly between the NBW and tumor regions. A statistically significant difference existed between the NBW and tumor regions for the MTRasym(3.5 ppm) values (p < 0.001). The proposed model was preferred to the polynomial models from literature based on the AICc metric. Application of the technique to patient images showed the potential to distinguish NBW from bladder cancer based on the statistically significant MTRasym(3.5 ppm) values in these regions.

Subjects/Keywords: MRI; CEST; magnetization transfer; quantitative imaging

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APA (6^th Edition):

Schurr, R. N. (2015). Z-Spectral Modeling for Magnetization Transfer Ratio Asymmetry Calculations in Chemical Exchange Saturation Transfer MRI at 3 Tesla. (Masters Thesis). Louisiana State University. Retrieved from etd-06182015-155915 ; https://digitalcommons.lsu.edu/gradschool_theses/2661

Chicago Manual of Style (16^th Edition):

Schurr, Ryan Nicholas. “Z-Spectral Modeling for Magnetization Transfer Ratio Asymmetry Calculations in Chemical Exchange Saturation Transfer MRI at 3 Tesla.” 2015. Masters Thesis, Louisiana State University. Accessed August 15, 2018. etd-06182015-155915 ; https://digitalcommons.lsu.edu/gradschool_theses/2661.

MLA Handbook (7^th Edition):

Schurr, Ryan Nicholas. “Z-Spectral Modeling for Magnetization Transfer Ratio Asymmetry Calculations in Chemical Exchange Saturation Transfer MRI at 3 Tesla.” 2015. Web. 15 Aug 2018.

Vancouver:

Schurr RN. Z-Spectral Modeling for Magnetization Transfer Ratio Asymmetry Calculations in Chemical Exchange Saturation Transfer MRI at 3 Tesla. [Internet] [Masters thesis]. Louisiana State University; 2015. [cited 2018 Aug 15]. Available from: etd-06182015-155915 ; https://digitalcommons.lsu.edu/gradschool_theses/2661.

Council of Science Editors:

Schurr RN. Z-Spectral Modeling for Magnetization Transfer Ratio Asymmetry Calculations in Chemical Exchange Saturation Transfer MRI at 3 Tesla. [Masters Thesis]. Louisiana State University; 2015. Available from: etd-06182015-155915 ; https://digitalcommons.lsu.edu/gradschool_theses/2661

McMaster University

11. Cao, Jun. Electrosynthesis and Characterization of Superparamagnetic Organic-Inorganic Nanocomposite Films.

Degree: PhD, 2008, McMaster University

URL: http://hdl.handle.net/11375/16579

►

New electrochemical methods were developed to fabricate superparamagnetic organic-inorganic nanocomposites. The methods were based on the electrosynthesis of y-Fe203, Mn304 and NiFe204 in situ in… (more)

▼

New electrochemical methods were developed to fabricate superparamagnetic organic-inorganic nanocomposites. The methods were based on the electrosynthesis of y-Fe203, Mn304 and NiFe204 in situ in a polymer matrix. Various composite materials were developed using new electrochemical strategies, which were based on the use of strong and weak polyelectrolytes and polymer-metal ion complexes. The deposited films were studied by XRD, TG, DTA, SEM and AFM. The results show that cathodic deposits with thickness of several microns can be obtained on various conductive substrates. The results reveal that the weight percentage of inorganic phase in the deposits reduced with the increase of the polymer concentration in the electrochemical bath solution. The particle size distribution was measured by HR TEM and evaluated by theoretical models interpreting the magnetic measurement data. The two methods are in good agreement with each other. The results show that the average particle sizes of Mn304 and y-Fe203 can be adjusted by the selection of polymers with different functional properties, the polymer concentration in the solutions and annealing temperatures. The particle size distribution in the developed composites followed the lognormal distribution. A double-lognormal distribution was required to interpret the magnetization data of the system containing strong interparticle interactions, and to interpret the double-peak phenomenon observed in the imaginary part of the susceptibility in some nanocomposites. DC magnetization and AC susceptibility measurements were used to study the relationship between the magnetic properties .and the average particle size by studying the superparamagnetic behavior and ferrimagnetnc phase transitions of y-Fe203 and Mn304 nanoparticles in the temperature range of 2K - 300K. The results show that the blocking temperature T(B) is mainly controlled by the average particle size of the nanoparticles, and increasing the average particle size results in an upward shift of the T(B) . One observes no frequency dependence of T(B), which indicates strong interparticle interaction in the nanoparticle assembly, in agreement with the structural results. The results revealed superparamagnetic behavior in Mn30 4 nanoparticles below the ferrimagnetic Neel temperature T(N), and that T(B) was identified by a peak in the temperature lower than the ferrimagnetic transition peak marked by T(N) in the AC measurement. It is found that both T(B) and T(N) of Mn304 depend on the average particle size, and reducing the average particle size of Mn304 from 3.5 nm to 2.8 nm results in a shift of T(B) from 14K to 7K, and T(N) from 36K to 31K (bulk Mn304 T(N)= 42 K)

Thesis

Doctor of Philosophy (PhD)

Advisors/Committee Members: Niewczas, M., Zhitormirsky, I., Materials Science and Engineering.

Subjects/Keywords: superparamagnetic organic-inorganic nanocomposites; magnetization; particle size

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APA (6^th Edition):

Cao, J. (2008). Electrosynthesis and Characterization of Superparamagnetic Organic-Inorganic Nanocomposite Films. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/16579

Chicago Manual of Style (16^th Edition):

Cao, Jun. “Electrosynthesis and Characterization of Superparamagnetic Organic-Inorganic Nanocomposite Films.” 2008. Doctoral Dissertation, McMaster University. Accessed August 15, 2018. http://hdl.handle.net/11375/16579.

MLA Handbook (7^th Edition):

Cao, Jun. “Electrosynthesis and Characterization of Superparamagnetic Organic-Inorganic Nanocomposite Films.” 2008. Web. 15 Aug 2018.

Vancouver:

Cao J. Electrosynthesis and Characterization of Superparamagnetic Organic-Inorganic Nanocomposite Films. [Internet] [Doctoral dissertation]. McMaster University; 2008. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/11375/16579.

Council of Science Editors:

Cao J. Electrosynthesis and Characterization of Superparamagnetic Organic-Inorganic Nanocomposite Films. [Doctoral Dissertation]. McMaster University; 2008. Available from: http://hdl.handle.net/11375/16579

University of Victoria

12. Zhang, Lei. Magnetization Damping in Microstructured Ferromagnetic Materials.

Degree: Dept. of Physics and Astronomy, 2013, University of Victoria

URL: http://hdl.handle.net/1828/4702

► The magnetization damping properties of square permalloy elements were characterized. These 20 nm-thick permalloy squares were deposited by the electron beam evaporation. Time resolved magneto-optic… (more)

Subjects/Keywords: Magnetization Damping; Microstructured Ferromagnetic Materials; TR-MOKE

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APA (6^th Edition):

Zhang, L. (2013). Magnetization Damping in Microstructured Ferromagnetic Materials. (Masters Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/4702

Chicago Manual of Style (16^th Edition):

Zhang, Lei. “Magnetization Damping in Microstructured Ferromagnetic Materials.” 2013. Masters Thesis, University of Victoria. Accessed August 15, 2018. http://hdl.handle.net/1828/4702.

MLA Handbook (7^th Edition):

Zhang, Lei. “Magnetization Damping in Microstructured Ferromagnetic Materials.” 2013. Web. 15 Aug 2018.

Vancouver:

Zhang L. Magnetization Damping in Microstructured Ferromagnetic Materials. [Internet] [Masters thesis]. University of Victoria; 2013. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/1828/4702.

Council of Science Editors:

Zhang L. Magnetization Damping in Microstructured Ferromagnetic Materials. [Masters Thesis]. University of Victoria; 2013. Available from: http://hdl.handle.net/1828/4702

University of Missouri – Columbia

13. He, Jiexuan, 1980-. Effects of spin current in ferromagnets.

Degree: PhD, 2008, University of Missouri – Columbia

URL: http://hdl.handle.net/10355/6060

► [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] This thesis focuses on the investigation of magnetization dynamics induced by spin transfer torques. The… (more)

Subjects/Keywords: Magnetization; Spintronics; Ferromagnetism

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APA (6^th Edition):

He, Jiexuan, 1. (2008). Effects of spin current in ferromagnets. (Doctoral Dissertation). University of Missouri – Columbia. Retrieved from http://hdl.handle.net/10355/6060

Chicago Manual of Style (16^th Edition):

He, Jiexuan, 1980-. “Effects of spin current in ferromagnets.” 2008. Doctoral Dissertation, University of Missouri – Columbia. Accessed August 15, 2018. http://hdl.handle.net/10355/6060.

MLA Handbook (7^th Edition):

He, Jiexuan, 1980-. “Effects of spin current in ferromagnets.” 2008. Web. 15 Aug 2018.

Vancouver:

He, Jiexuan 1. Effects of spin current in ferromagnets. [Internet] [Doctoral dissertation]. University of Missouri – Columbia; 2008. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/10355/6060.

Council of Science Editors:

He, Jiexuan 1. Effects of spin current in ferromagnets. [Doctoral Dissertation]. University of Missouri – Columbia; 2008. Available from: http://hdl.handle.net/10355/6060

University of Victoria

14. Xu, Haitian. Magnetization dynamics in lithographically patterned Ni80Fe20/Ir20Mn80 exchange-biased square elements.

Degree: Dept. of Physics and Astronomy, 2012, University of Victoria

URL: http://hdl.handle.net/1828/4173

► The magnetic properties and crystal texture of micron-sized, lithographically patterned ferromagnetic/antiferromagnetic (FM/AF) exchange-coupled elements supporting vortex remanent magnetization states were characterized using experimental and numerical… (more)

Subjects/Keywords: Exchange-bias; Magnetization dynamics; Vortex magnetization; Time-resolved magnetic microscopy; Numerical modeling

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APA (6^th Edition):

Xu, H. (2012). Magnetization dynamics in lithographically patterned Ni80Fe20/Ir20Mn80 exchange-biased square elements. (Masters Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/4173

Chicago Manual of Style (16^th Edition):

Xu, Haitian. “Magnetization dynamics in lithographically patterned Ni80Fe20/Ir20Mn80 exchange-biased square elements.” 2012. Masters Thesis, University of Victoria. Accessed August 15, 2018. http://hdl.handle.net/1828/4173.

MLA Handbook (7^th Edition):

Xu, Haitian. “Magnetization dynamics in lithographically patterned Ni80Fe20/Ir20Mn80 exchange-biased square elements.” 2012. Web. 15 Aug 2018.

Vancouver:

Xu H. Magnetization dynamics in lithographically patterned Ni80Fe20/Ir20Mn80 exchange-biased square elements. [Internet] [Masters thesis]. University of Victoria; 2012. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/1828/4173.

Council of Science Editors:

Xu H. Magnetization dynamics in lithographically patterned Ni80Fe20/Ir20Mn80 exchange-biased square elements. [Masters Thesis]. University of Victoria; 2012. Available from: http://hdl.handle.net/1828/4173

15. Dupont, Louis. Développement d'un dispositif de champ magnétique réversible à base des cryo-aimants supraconducteurs : Development of a pulsed magnetic field generator based on superconducting cryo-magnets.

Degree: Docteur es, Chimie, 2018, Normandie

URL: http://www.theses.fr/2018NORMC209

►

Les cryo-aimants supraconducteurs sont des sources de champs magnétiques intenses, compactes et peu gourmandes en énergie. Il existe diverses méthodes d’aimantation mais seule l’aimantation par… (more)

▼

Les cryo-aimants supraconducteurs sont des sources de champs magnétiques intenses, compactes et peu gourmandes en énergie. Il existe diverses méthodes d’aimantation mais seule l’aimantation par champ magnétique pulsé (PFM) permet d’obtenir des champs excitateurs élevés sans recourir à des bobines supraconductrices refroidies.Basé sur une collaboration industrielle, ce travail a été consacré dans un premier temps à la conception d’un générateur de courant pulsé compact et évolutif générant des rampes de pulse de polarité réglage pouvant atteindre 3000A.Dans un second temps, nous avons mis en place les différents systèmes permettant l’aimantation des cryo-aimants refroidis soit à 77 K, soit dans un cryostat refroidi par un cryo-générateur.Enfin, l’aimantation par pulses de champ des cryo-aimants supraconducteurs a montré la possibilité de piéger un champ magnétique de l’ordre du tesla, réversible et reproductible. Les résultats obtenus répondent aux impératifs industriels de l’étude. Ils sont très encourageants pour le développement d’un dispositif de champ magnétique réversible à base de cryo-aimants supraconducteurs pour l’instrumentation scientifique ou pour les applications électrotechniques.

Superconducting cryomagnets are high magnetic fields sources that are both compact and energy efficient. There are various magnetization technics but only the magnetization by pulsed magnetic field (PFM) results in high excitation fields, that otherwise could only be obtained with large superconducting coils.This work was done in the framework of an industrial collaboration. In a first step, a compact and innovative pulse current generator enabling the generation of pulses with a 3000 Amps maximum intensity was designed and fabricated. Secondly, different systems for the magnetization of cryo-magnets either cooled down to 77 K or cooled in a cryostat by a cryo-generator were implemented. Finally, the pulsed field magnetization of superconducting cryo-magnets has shown that reversible and reproducible magnetic field in the one Tesla range could be generated by the set up.The results obtained are consistent with the industrial goals of this study. They are very encouraging for the development of reversible magnetic field devices based on superconducting cryo-magnets and dedicated to scientific instrumentation or for electrotechnical applications.

Advisors/Committee Members: Bernstein, Pierre (thesis director), Noudem, Jacques Guillaume (thesis director).

Subjects/Keywords: Cryo-aimants supraconducteurs; Générateur compact; Champ magnétique pulsé (PFM); Superconductor cryomagnets; Compact generator; Magnetization; Pulsed Field Magnetization (PFM)

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

APA (6^th Edition):

Dupont, L. (2018). Développement d'un dispositif de champ magnétique réversible à base des cryo-aimants supraconducteurs : Development of a pulsed magnetic field generator based on superconducting cryo-magnets. (Doctoral Dissertation). Normandie. Retrieved from http://www.theses.fr/2018NORMC209

Chicago Manual of Style (16^th Edition):

Dupont, Louis. “Développement d'un dispositif de champ magnétique réversible à base des cryo-aimants supraconducteurs : Development of a pulsed magnetic field generator based on superconducting cryo-magnets.” 2018. Doctoral Dissertation, Normandie. Accessed August 15, 2018. http://www.theses.fr/2018NORMC209.

MLA Handbook (7^th Edition):

Dupont, Louis. “Développement d'un dispositif de champ magnétique réversible à base des cryo-aimants supraconducteurs : Development of a pulsed magnetic field generator based on superconducting cryo-magnets.” 2018. Web. 15 Aug 2018.

Vancouver:

Dupont L. Développement d'un dispositif de champ magnétique réversible à base des cryo-aimants supraconducteurs : Development of a pulsed magnetic field generator based on superconducting cryo-magnets. [Internet] [Doctoral dissertation]. Normandie; 2018. [cited 2018 Aug 15]. Available from: http://www.theses.fr/2018NORMC209.

Council of Science Editors:

Dupont L. Développement d'un dispositif de champ magnétique réversible à base des cryo-aimants supraconducteurs : Development of a pulsed magnetic field generator based on superconducting cryo-magnets. [Doctoral Dissertation]. Normandie; 2018. Available from: http://www.theses.fr/2018NORMC209

Université de Lorraine

16. Gony, Bashar. Aimantation de pastilles supraconductrices : Magnetization of superconducting bulks.

Degree: Docteur es, Génie électrique, 2015, Université de Lorraine

URL: http://www.theses.fr/2015LORR0110

►

Les pastilles supraconductrices peuvent produire des forts champs magnétiques très supérieurs aux aimants permanents. Plusieurs méthodes d’aimantation de ces pastilles existent néanmoins une seule est… (more)

▼

Les pastilles supraconductrices peuvent produire des forts champs magnétiques très supérieurs aux aimants permanents. Plusieurs méthodes d’aimantation de ces pastilles existent néanmoins une seule est principalement utilisée pour les applications en génie électrique, l’aimantation par champ magnétique impulsionnel (Pulsed Field Magnetization). Afin de maîtriser l’aimantation de ces pastilles supraconductrices par PFM, nous avons étudié l’influence de la forme de l’inducteur sur le champ magnétique piégé où nous trouvons une influence significative de la forme de l’inducteur sur le champ piégé dans la pastille supraconductrice. Afin de prévoir la mise en oeuvre des pastilles supraconductrices dans des applications en génie électrique, nous avons étudié l’aimantation de ces pastilles dans un circuit magnétique et l’influence de ce circuit sur le champ piégé. Nous remarquons une nette amélioration du champ piégé dans la pastille en utilisant le circuit magnétique. Nous avons étudié, également, l’influence d’un champ démagnétisant impulsionnel et alternatif sur le champ piégé dans une pastille supraconductrice aimantée. Les dégradations observées ne montrent pas de contre-indication à l’utilisation des pastilles supraconductrices aimantées dans les applications en génie électrique.

The superconducting bulks can produce very strong magnetic fields greater than those of permanent magnets can. Several methods of magnetization of the superconducting bulks exist, however one is mainly used for the electrical applications, the Pulsed Field Magnetization. In order to control the magnetization of the superconducting bulks by PFM, we studied the influence of the shape of the inductor on the trapped magnetic field where we find a significant influence of the shape of the inductor on the trapped magnetic field in the anticipate superconducting bulk. In order to the implementation of the superconducting bulk in the electrical applications, we studied the magnetization of these bulks in a magnetic core and the influence of this magnetic core on the trapped magnetic field. We notice an important improvement of the trapped magnetic field in the superconducting bulk by using the magnetic core. We studied also the influence of a pulsed and an alternating demagnetizing field on the trapped magnetic field in a superconducting bulk. The observed degradation does not show any contraindication to use the superconducting magnetic bulks in the electrical engineering applications.

Advisors/Committee Members: Douine, Bruno (thesis director), Berger, Kévin (thesis director).

Subjects/Keywords: Supraconducteur; Aimantation; Champs impulsionnels; Modélisation; Superconductor; Magnetization; Pulsed Field Magnetization (PFM); Modelling; 539.725; 538.4; 620.112 973

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

APA (6^th Edition):

Gony, B. (2015). Aimantation de pastilles supraconductrices : Magnetization of superconducting bulks. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2015LORR0110

Chicago Manual of Style (16^th Edition):

Gony, Bashar. “Aimantation de pastilles supraconductrices : Magnetization of superconducting bulks.” 2015. Doctoral Dissertation, Université de Lorraine. Accessed August 15, 2018. http://www.theses.fr/2015LORR0110.

MLA Handbook (7^th Edition):

Gony, Bashar. “Aimantation de pastilles supraconductrices : Magnetization of superconducting bulks.” 2015. Web. 15 Aug 2018.

Vancouver:

Gony B. Aimantation de pastilles supraconductrices : Magnetization of superconducting bulks. [Internet] [Doctoral dissertation]. Université de Lorraine; 2015. [cited 2018 Aug 15]. Available from: http://www.theses.fr/2015LORR0110.

Council of Science Editors:

Gony B. Aimantation de pastilles supraconductrices : Magnetization of superconducting bulks. [Doctoral Dissertation]. Université de Lorraine; 2015. Available from: http://www.theses.fr/2015LORR0110

17. Camarero, Julio. Note: Vectorial-magneto optical Kerr effect technique combined with variable temperature and full angular range all in a single setup.

Degree: 2018, American Institute of Physics Publising LLC

URL: http://hdl.handle.net/10486/676638

Subjects/Keywords: Cryostats; Magnetization; Magnetization reversal; Thermoelectricity; Angular dependencies; Física

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APA (6^th Edition):

Camarero, J. (2018). Note: Vectorial-magneto optical Kerr effect technique combined with variable temperature and full angular range all in a single setup. (Thesis). American Institute of Physics Publising LLC. Retrieved from http://hdl.handle.net/10486/676638

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):

Camarero, Julio. “Note: Vectorial-magneto optical Kerr effect technique combined with variable temperature and full angular range all in a single setup.” 2018. Thesis, American Institute of Physics Publising LLC. Accessed August 15, 2018. http://hdl.handle.net/10486/676638.

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

MLA Handbook (7^th Edition):

Camarero, Julio. “Note: Vectorial-magneto optical Kerr effect technique combined with variable temperature and full angular range all in a single setup.” 2018. Web. 15 Aug 2018.

Vancouver:

Camarero J. Note: Vectorial-magneto optical Kerr effect technique combined with variable temperature and full angular range all in a single setup. [Internet] [Thesis]. American Institute of Physics Publising LLC; 2018. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/10486/676638.

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

Council of Science Editors:

Camarero J. Note: Vectorial-magneto optical Kerr effect technique combined with variable temperature and full angular range all in a single setup. [Thesis]. American Institute of Physics Publising LLC; 2018. Available from: http://hdl.handle.net/10486/676638

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

University of New Orleans

18. Adams, Daniel J. Ferromagnetic Resonance Studies of Coupled Magnetic Systems.

Degree: MS, Physics, 2016, University of New Orleans

URL: https://scholarworks.uno.edu/td/2121

► The high-frequency properties of coupled magnetic systems have been investigated using vector network analyzer ferromagnetic resonance (VNA-FMR) spectroscopy. SAF structures consist of two ferromagnetic… (more)

Subjects/Keywords: ferromagnetic resonance; coupled; synthetic antiferromagnet; magnetization switching; Condensed Matter Physics

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APA (6^th Edition):

Adams, D. J. (2016). Ferromagnetic Resonance Studies of Coupled Magnetic Systems. (Thesis). University of New Orleans. Retrieved from https://scholarworks.uno.edu/td/2121

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):

Adams, Daniel J. “Ferromagnetic Resonance Studies of Coupled Magnetic Systems.” 2016. Thesis, University of New Orleans. Accessed August 15, 2018. https://scholarworks.uno.edu/td/2121.

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

MLA Handbook (7^th Edition):

Adams, Daniel J. “Ferromagnetic Resonance Studies of Coupled Magnetic Systems.” 2016. Web. 15 Aug 2018.

Vancouver:

Adams DJ. Ferromagnetic Resonance Studies of Coupled Magnetic Systems. [Internet] [Thesis]. University of New Orleans; 2016. [cited 2018 Aug 15]. Available from: https://scholarworks.uno.edu/td/2121.

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

Council of Science Editors:

Adams DJ. Ferromagnetic Resonance Studies of Coupled Magnetic Systems. [Thesis]. University of New Orleans; 2016. Available from: https://scholarworks.uno.edu/td/2121

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

19. Alecrim Junior, David Tenório. Avaliação da magnetoestricção de fases magnéticas no sistema Fe-Ti.

Degree: Mestrado, Materiais Metálicos, Cerâmicos e Poliméricos, 2012, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/97/97134/tde-26082013-100606/ ;

►

Trabalhos publicados a partir do ano 2000 mostraram que a adição de Ga e Al ao Fe resulta em ligas com elevada magnetoestricção em campos… (more)

▼

Trabalhos publicados a partir do ano 2000 mostraram que a adição de Ga e Al ao Fe resulta em ligas com elevada magnetoestricção em campos magnéticos baixos, além de boas propriedades mecânicas e baixo custo associado (CLARK, 2001; GURUSWAMY, 2004). A partir daí os esforços foram direcionados para a descoberta de novas ligas magnetoestrictivas à base de Fe com propriedades similares às encontradas nas ligas Fe-Ga e Fe-Al. De fato, altos valores de magnetoestricção são de grande interesse para aplicações principalmente em sensores e atuadores, mas valores de magnetoestricção muito baixos ou nulos também proporcionam uma propriedade notável e desejável para muitas aplicações como em transformadores elétricos e sensores de fluxo. Este fenômeno de magnetoestricção ocorre em materiais que exibem deformação elástica na presença de um campo magnético aplicado. No presente trabalho, foi adicionado o titânio ao ferro para avaliar a influência em ligas de Fe-Ti com diferentes frações volumétricas da fase Fe2Ti na magnetoestricção e a relação com a microestrutura das ligas. Foi descoberto que as amostras de Fe100-xTix para x < 34,0 at.% apresentam uma magnetoestricção muito pequena. O Ti tem uma pequena solubilidade no ?-Fe, de aproximadamente 8,5% a 1200 ºC e diminui a 5% a 1000 ºC formando uma fase que também é ferromagnética. Assim, quando a solubilidade de Ti em ?-Fe é excedida há então a formação desta fase ferromagnética ordenada Fe2Ti chamada de Laves, com estrutura cristalina C14. Como a quantidade de Ti aumenta nas ligas estudadas, a fração volumétrica da fase Laves também aumenta e assim foi possível avaliar a magnetoestricção e a microestrutura das ligas formadas. Para isso, foram produzidas por fusão a arco as ligas com 1,61% a 34,0 % de Ti. Todas estas ligas foram submetidas a tratamentos térmicos em 1200 °C por 60 h para fim de homogeneização destas. A magnetoestricção de saturação (?S) medida nas amostras foi muito pequena. Para as ligas com 20 e 28,0% Ti, a ?S foi positiva nas e para as demais, ?S foi negativa. Concluiu-se que a substituição do Fe por Ti de um modo geral melhorou a magnetoestricção do Fe, porém a melhora não foi tão relevante quanto à observada pela substituição por Ga.

Since 2000, studies indicated that the addition of Ga and Al in Fe results in alloys with high magnetostriction at low magnetics fields as well as good mechanical properties and low cost associated (CLARK, 2001; GURUSWAMY, 2004). Since that, efforts have been directed to the discovery of new magnetostrictive Fe-based alloys with similar properties to those found in Fe-Ga and Fe-Al alloys.In fact, high values of magntetostriction are of great interest for applications, mainly in electric sensors and actuators but low values or zero magnetostriction is also a remarkable property, desirable for many applications such as electric transformers and fluxgate sensor cores. This phenomenon of magnetostriction occurs in materials that exhibit elastic strain in the presence of an applied magnetic field. In the present work, titanium was…

Advisors/Committee Members: Nunes, Cristina Bórmio.

Subjects/Keywords: Fe-Ti; Fe-Ti; Magnetização; Magnetization; Magnetoestricção; Magnetostriction

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

APA (6^th Edition):

Alecrim Junior, D. T. (2012). Avaliação da magnetoestricção de fases magnéticas no sistema Fe-Ti. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/97/97134/tde-26082013-100606/ ;

Chicago Manual of Style (16^th Edition):

Alecrim Junior, David Tenório. “Avaliação da magnetoestricção de fases magnéticas no sistema Fe-Ti.” 2012. Masters Thesis, University of São Paulo. Accessed August 15, 2018. http://www.teses.usp.br/teses/disponiveis/97/97134/tde-26082013-100606/ ;.

MLA Handbook (7^th Edition):

Alecrim Junior, David Tenório. “Avaliação da magnetoestricção de fases magnéticas no sistema Fe-Ti.” 2012. Web. 15 Aug 2018.

Vancouver:

Alecrim Junior DT. Avaliação da magnetoestricção de fases magnéticas no sistema Fe-Ti. [Internet] [Masters thesis]. University of São Paulo; 2012. [cited 2018 Aug 15]. Available from: http://www.teses.usp.br/teses/disponiveis/97/97134/tde-26082013-100606/ ;.

Council of Science Editors:

Alecrim Junior DT. Avaliação da magnetoestricção de fases magnéticas no sistema Fe-Ti. [Masters Thesis]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/97/97134/tde-26082013-100606/ ;

University of Florida

20. Ninios, Konstantinos D. Micromechanical Force Magnetometers for Measuring Magnetization at High Magnetic Fields and Low Temperatures.

Degree: Physics, 2011, University of Florida

URL: http://ufdc.ufl.edu/UFE0043761

► Quantum magnets and quantum phase transitions are two of the most interesting research topics in condensed matter physics nowadays. Their study often requires magnetization measurements… (more)

Subjects/Keywords: dimpy – force – luttinger – magnetization – magnetometers – mems – tll – wilson; Physics

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APA (6^th Edition):

Ninios, K. D. (2011). Micromechanical Force Magnetometers for Measuring Magnetization at High Magnetic Fields and Low Temperatures. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0043761

Chicago Manual of Style (16^th Edition):

Ninios, Konstantinos D. “Micromechanical Force Magnetometers for Measuring Magnetization at High Magnetic Fields and Low Temperatures.” 2011. Doctoral Dissertation, University of Florida. Accessed August 15, 2018. http://ufdc.ufl.edu/UFE0043761.

MLA Handbook (7^th Edition):

Ninios, Konstantinos D. “Micromechanical Force Magnetometers for Measuring Magnetization at High Magnetic Fields and Low Temperatures.” 2011. Web. 15 Aug 2018.

Vancouver:

Ninios KD. Micromechanical Force Magnetometers for Measuring Magnetization at High Magnetic Fields and Low Temperatures. [Internet] [Doctoral dissertation]. University of Florida; 2011. [cited 2018 Aug 15]. Available from: http://ufdc.ufl.edu/UFE0043761.

Council of Science Editors:

Ninios KD. Micromechanical Force Magnetometers for Measuring Magnetization at High Magnetic Fields and Low Temperatures. [Doctoral Dissertation]. University of Florida; 2011. Available from: http://ufdc.ufl.edu/UFE0043761

21. Kneip, Martin K. Magnetization dynamics in diluted magnetic semiconductor heterostructures.

Degree: 2008, Technische Universität Dortmund

URL: http://hdl.handle.net/2003/25822

Subjects/Keywords: DMS; Magnetization dynamics; Spintronics; 530

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

APA (6^th Edition):

Kneip, M. K. (2008). Magnetization dynamics in diluted magnetic semiconductor heterostructures. (Thesis). Technische Universität Dortmund. Retrieved from http://hdl.handle.net/2003/25822

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):

Kneip, Martin K. “Magnetization dynamics in diluted magnetic semiconductor heterostructures.” 2008. Thesis, Technische Universität Dortmund. Accessed August 15, 2018. http://hdl.handle.net/2003/25822.

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

MLA Handbook (7^th Edition):

Kneip, Martin K. “Magnetization dynamics in diluted magnetic semiconductor heterostructures.” 2008. Web. 15 Aug 2018.

Vancouver:

Kneip MK. Magnetization dynamics in diluted magnetic semiconductor heterostructures. [Internet] [Thesis]. Technische Universität Dortmund; 2008. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/2003/25822.

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

Council of Science Editors:

Kneip MK. Magnetization dynamics in diluted magnetic semiconductor heterostructures. [Thesis]. Technische Universität Dortmund; 2008. Available from: http://hdl.handle.net/2003/25822

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

University of South Carolina

22. Egenriether, Brian. Time-Domain Measurement Of Ultrafast Magnetization Dynamics In Magnetic Nanoparticles.

Degree: MS, Electrical Engineering, 2016, University of South Carolina

URL: http://scholarcommons.sc.edu/etd/3439

► Ultrafast time-domain measurements are made on collections of Fe3O4 magnetic nanoparticles using an inductive measurement technique. The 10nm particles are placed directly on a… (more)

Subjects/Keywords: Electrical and Computer Engineering; Engineering; Time-Domain; Ulrafast Magnetization; Magnetic Nanoparticles

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APA (6^th Edition):

Egenriether, B. (2016). Time-Domain Measurement Of Ultrafast Magnetization Dynamics In Magnetic Nanoparticles. (Masters Thesis). University of South Carolina. Retrieved from http://scholarcommons.sc.edu/etd/3439

Chicago Manual of Style (16^th Edition):

Egenriether, Brian. “Time-Domain Measurement Of Ultrafast Magnetization Dynamics In Magnetic Nanoparticles.” 2016. Masters Thesis, University of South Carolina. Accessed August 15, 2018. http://scholarcommons.sc.edu/etd/3439.

MLA Handbook (7^th Edition):

Egenriether, Brian. “Time-Domain Measurement Of Ultrafast Magnetization Dynamics In Magnetic Nanoparticles.” 2016. Web. 15 Aug 2018.

Vancouver:

Egenriether B. Time-Domain Measurement Of Ultrafast Magnetization Dynamics In Magnetic Nanoparticles. [Internet] [Masters thesis]. University of South Carolina; 2016. [cited 2018 Aug 15]. Available from: http://scholarcommons.sc.edu/etd/3439.

Council of Science Editors:

Egenriether B. Time-Domain Measurement Of Ultrafast Magnetization Dynamics In Magnetic Nanoparticles. [Masters Thesis]. University of South Carolina; 2016. Available from: http://scholarcommons.sc.edu/etd/3439

Universiteit Utrecht

23. Oorschot, J.W.M. van. Endogenous assessment of myocardial fibrosis with quantitative MRI.

Degree: 2016, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/328798

► In this thesis, we have studied the use of quantitative MR contrast mechanisms, that could potentially be used for endogenous detection of myocardial fibrosis in… (more)

Subjects/Keywords: MRI; Cardiac; Heart; Endogenous; T1rho; Magnetization Transfer; Contrast agent; Native

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APA (6^th Edition):

Oorschot, J. W. M. v. (2016). Endogenous assessment of myocardial fibrosis with quantitative MRI. (Doctoral Dissertation). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/328798

Chicago Manual of Style (16^th Edition):

Oorschot, J W M van. “Endogenous assessment of myocardial fibrosis with quantitative MRI.” 2016. Doctoral Dissertation, Universiteit Utrecht. Accessed August 15, 2018. http://dspace.library.uu.nl:8080/handle/1874/328798.

MLA Handbook (7^th Edition):

Oorschot, J W M van. “Endogenous assessment of myocardial fibrosis with quantitative MRI.” 2016. Web. 15 Aug 2018.

Vancouver:

Oorschot JWMv. Endogenous assessment of myocardial fibrosis with quantitative MRI. [Internet] [Doctoral dissertation]. Universiteit Utrecht; 2016. [cited 2018 Aug 15]. Available from: http://dspace.library.uu.nl:8080/handle/1874/328798.

Council of Science Editors:

Oorschot JWMv. Endogenous assessment of myocardial fibrosis with quantitative MRI. [Doctoral Dissertation]. Universiteit Utrecht; 2016. Available from: http://dspace.library.uu.nl:8080/handle/1874/328798

University of Toronto

24. Desmond, Kimberly Lara. Endogenous Chemical Exchange Saturation Transfer: Quantitative Modelling and Application in Cancer.

Degree: PhD, 2014, University of Toronto

URL: http://hdl.handle.net/1807/73783

► This work describes the origins of the contrast mechanism chemical exchange saturation transfer (CEST) and methods for proton magnetic resonance imaging (MRI), with application in… (more)

▼ This work describes the origins of the contrast mechanism chemical exchange saturation transfer (CEST) and methods for proton magnetic resonance imaging (MRI), with application in cancer. It focuses on endogenous techniques, which do not require the injection of a contrast agent, and the experimental and analytic techniques which allow quantitative metrics to be obtained. The theory behind CEST is presented, and it is modelled using a three pool system of Bloch equations which are a function of magnetization relaxation parameters, CEST pool concentration, and hydrogen exchange rate constant. A platform is created for optimization and parameter fitting, which is used to obtain parameter values and for pulse sequence experimental design. The contribution of semi-solid macromolecules to the CEST spectrum is determined, and evidence given that the CEST parameters (in particular, the exchange rate constant) can be obtained independently of this additional pool. It is shown that there is a linear relationship between the log of the exchange rate constant and pH. CEST spectra are obtained in cancer xenografts in mice, exhibiting features from amide, amine and aliphatic protons as well as from magnetization transfer. Semi-quantitative CEST parameter maps are derived, showing the distribution of CEST features in tumours and in contrast with the surrounding normal-appearing muscle. Several exploratory experiments are performed in protein-containing phantoms and cell pellets in order to validate the origins of CEST spectra and their behaviour in conditions of changing pH and temperature. Cell pellet experiments support the hypothesis that CEST is sensitive primarily to intracellular conditions, and furthermore that the cell nucleus is a concentrated source of CEST-contributing proteins. These validation experiments are supportive of the assumptions made in the next section, in which a ratiometric method of determining intracellular pH from CEST spectra is proposed and proof-of-concept experiments are performed. Ultimately, the work contained herein supports the hypothesis that the endogenous CEST experiments provide new information not obtainable from other MRI experiments, leading to quantitative absolute intracellular pH mapping. This has potential for predicting the effectiveness of treatment regimens based upon the relationship between intracellular pH and drug uptake, establishing regions of tumour which are actively proliferating or which may be resistant to therapy. Advisors/Committee Members: Stanisz, Greg J, Medical Biophysics.

Subjects/Keywords: CEST; chemical exchange saturation transfer; magnetization transfer; MRI; pH; 0786

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APA (6^th Edition):

Desmond, K. L. (2014). Endogenous Chemical Exchange Saturation Transfer: Quantitative Modelling and Application in Cancer. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/73783

Chicago Manual of Style (16^th Edition):

Desmond, Kimberly Lara. “Endogenous Chemical Exchange Saturation Transfer: Quantitative Modelling and Application in Cancer.” 2014. Doctoral Dissertation, University of Toronto. Accessed August 15, 2018. http://hdl.handle.net/1807/73783.

MLA Handbook (7^th Edition):

Desmond, Kimberly Lara. “Endogenous Chemical Exchange Saturation Transfer: Quantitative Modelling and Application in Cancer.” 2014. Web. 15 Aug 2018.

Vancouver:

Desmond KL. Endogenous Chemical Exchange Saturation Transfer: Quantitative Modelling and Application in Cancer. [Internet] [Doctoral dissertation]. University of Toronto; 2014. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/1807/73783.

Council of Science Editors:

Desmond KL. Endogenous Chemical Exchange Saturation Transfer: Quantitative Modelling and Application in Cancer. [Doctoral Dissertation]. University of Toronto; 2014. Available from: http://hdl.handle.net/1807/73783

University of Oregon

25. Chess, Jordan. Mapping topological magnetization and magnetic skyrmions.

Degree: 2018, University of Oregon

URL: http://hdl.handle.net/1794/23188

► A 2014 study by the US Department of Energy conducted at Lawrence Berkeley National Laboratory estimated that U.S. data centers consumed 70 billion kWh of… (more)

Subjects/Keywords: Domain wall chirality; Hopf index; LTEM; Magnetic Imaging; Skyrmion; Topological magnetization

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APA (6^th Edition):

Chess, J. (2018). Mapping topological magnetization and magnetic skyrmions. (Thesis). University of Oregon. Retrieved from http://hdl.handle.net/1794/23188

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):

Chess, Jordan. “Mapping topological magnetization and magnetic skyrmions.” 2018. Thesis, University of Oregon. Accessed August 15, 2018. http://hdl.handle.net/1794/23188.

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

MLA Handbook (7^th Edition):

Chess, Jordan. “Mapping topological magnetization and magnetic skyrmions.” 2018. Web. 15 Aug 2018.

Vancouver:

Chess J. Mapping topological magnetization and magnetic skyrmions. [Internet] [Thesis]. University of Oregon; 2018. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/1794/23188.

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

Council of Science Editors:

Chess J. Mapping topological magnetization and magnetic skyrmions. [Thesis]. University of Oregon; 2018. Available from: http://hdl.handle.net/1794/23188

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

Oregon State University

26. Audunsson, Haraldur. Paleomagnetism, magnetic properties and thermal history of a thick transitional-polarity lava.

Degree: PhD, Geophysics, 1989, Oregon State University

URL: http://hdl.handle.net/1957/29359

► The Roza flow of the Columbia River Basalt group in Washington State U.S.A. extruded at about 15 Ma during intermediate geomagnetic polarity. The Roza is… (more)

▼ The Roza flow of the Columbia River Basalt group in Washington State U.S.A. extruded at about 15 Ma during intermediate geomagnetic polarity. The Roza is underlain by normal polarity flows and overlain by reversed units. The Roza is an extensive flow, up to 60 in thick. As the remanence-blocking isotherms progressed into the flow, it recorded a short continuous segment of the transitional geomagnetic field. Our studies show limited thermal remagnetization in the underlying flow, and we infer that groundwater was effective in extracting the heat. The extent of basement heating was further reduced by the insulating scoria immediately beneath Roza. Hence, the Roza flow cooled symmetrically from its top and base. Samples from the drilicores acquired drilling induced remanent magnetization (DIRM), shown to be well modelled as an isothermal remanent magnetization produced in nonuniform fields of the order of 10 mT at the rim of the drillstring. Alternating field demagnetization was usually successful in removing the DIRM. The remanence stability is higher in the top third of Roza, due to smaller magnetic particles, than in the lower two thirds of the flow, where the magnetic properties are nearly uniform. The stability profile corresponds to the entablature/colonnade subdivision. High temperature subsolidus oxidation of the titanomagnetites increased with height in the flow, altering the primary symmetric intraflow distribution. The declination of the Roza flow sampled at numerous outcrops is consistently about 189°. In a 54 m drillcore section, Roza inclinations become more negative towards the flow interior, consistent with its magnetostratigraphic position. Superimposed is a symmetric, rapid change in inclination from -2 to -15° and back to -5°. The flow's thermal history predicts that these fluctuations have a characteristic time between 15 and 60 years, such that the inclination changed at a rate of 1/2 to 2° per year, showing that the directions of this transitional field fluctuated several times more rapidly than the present geomagnetic field. However, considering the generally reduced intensity during transitions, these fluctuations might not be unusual. Advisors/Committee Members: Levi, Shaul (advisor).

Subjects/Keywords: Thermoremanent magnetization – Columbia Plateau

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APA (6^th Edition):

Audunsson, H. (1989). Paleomagnetism, magnetic properties and thermal history of a thick transitional-polarity lava. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/29359

Chicago Manual of Style (16^th Edition):

Audunsson, Haraldur. “Paleomagnetism, magnetic properties and thermal history of a thick transitional-polarity lava.” 1989. Doctoral Dissertation, Oregon State University. Accessed August 15, 2018. http://hdl.handle.net/1957/29359.

MLA Handbook (7^th Edition):

Audunsson, Haraldur. “Paleomagnetism, magnetic properties and thermal history of a thick transitional-polarity lava.” 1989. Web. 15 Aug 2018.

Vancouver:

Audunsson H. Paleomagnetism, magnetic properties and thermal history of a thick transitional-polarity lava. [Internet] [Doctoral dissertation]. Oregon State University; 1989. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/1957/29359.

Council of Science Editors:

Audunsson H. Paleomagnetism, magnetic properties and thermal history of a thick transitional-polarity lava. [Doctoral Dissertation]. Oregon State University; 1989. Available from: http://hdl.handle.net/1957/29359

University of Arizona

27. Bills, Francis Anthony, 1933-. Ferrimagnetic resonance in doubly triangular systems .

Degree: 1961, University of Arizona

URL: http://hdl.handle.net/10150/319351

Subjects/Keywords: Magnetic resonance.; Magnetization.; Ferrimagnetism.

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APA (6^th Edition):

Bills, Francis Anthony, 1. (1961). Ferrimagnetic resonance in doubly triangular systems . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/319351

Chicago Manual of Style (16^th Edition):

Bills, Francis Anthony, 1933-. “Ferrimagnetic resonance in doubly triangular systems .” 1961. Masters Thesis, University of Arizona. Accessed August 15, 2018. http://hdl.handle.net/10150/319351.

MLA Handbook (7^th Edition):

Bills, Francis Anthony, 1933-. “Ferrimagnetic resonance in doubly triangular systems .” 1961. Web. 15 Aug 2018.

Vancouver:

Bills, Francis Anthony 1. Ferrimagnetic resonance in doubly triangular systems . [Internet] [Masters thesis]. University of Arizona; 1961. [cited 2018 Aug 15]. Available from: http://hdl.handle.net/10150/319351.

Council of Science Editors:

Bills, Francis Anthony 1. Ferrimagnetic resonance in doubly triangular systems . [Masters Thesis]. University of Arizona; 1961. Available from: http://hdl.handle.net/10150/319351

28. Hem, Jérôme. Mécanismes de synchronisation dans les oscillateurs à transfert de spin : Synchronization mechanisms of spin transfer oscillators.

Degree: Docteur es, Nanophysique, 2018, Grenoble Alpes

URL: http://www.theses.fr/2018GREAY005

►

L’auto-oscillateur à transfert de spin est un nano système dont la preuve de concept fut donnée au début des années 2000. Il possède un fort… (more)

▼

L’auto-oscillateur à transfert de spin est un nano système dont la preuve de concept fut donnée au début des années 2000. Il possède un fort potentiel applicatif dans le domaine des sources microonde à fréquence variable. Ses avantages sont : une fréquence émise dans la gamme RF (f ≈ 200 MHz – 20 GHz), une haute accordabilité grâce à la non linéarité et la possibilité de s’intégrer avec les procédés de l’électronique traditionnelle. Néanmoins à cause de sa taille, l’oscillateur est fortement perturbé par l’agitation thermique et il faut chercher différentes stratégies pour augmenter sa cohérence spectrale. Une solution prometteuse est la synchronisation mutuelle d’oscillateur. Afin de définir les meilleurs schémas de synchronisation, il est important d’étudier et de caractériser la synchronisation à une source externe.Ce travail, d’ordre théorique, traite la synchronisation d’un oscillateur spintronique à un signal microonde. L’équation de mouvement de l’aimantation (équation de Landau-Lifshitz-Gilbert-Slonczewski) est transformée en une équation d’amplitude complexe, qui permet de traiter les différents mécanismes de synchronisation de manière unifiée. En particulier, nous introduisons les forçages canoniques de l’oscillateur, transformés des couples {m x ui, m x m x ui}i=x,y,z et discutons leurs propriétés de synchronisation en fonction des paramètres non-linéaires. Dans le cas où l’oscillateur est fortement non isochrone (|| >> 1), il est possible de simplifier le problème pour traiter la combinaison de forçages canoniques, le régime transitoire, le régime de synchronisation sous température et sous fort signal externe. Les études analytiques sont confrontées aux études numériques et expérimentales pour un oscillateur à base d’une jonction tunnel.

The spin-transfer torque oscillator is a nano-sized system which could be part of the next generation of microwave current controlled oscillator. It combines several advantages as a frequency generation in the microwave range (f ≈ 200 MHz – 20 GHz), high tunability thanks to non-linearity and being fully compatible with CMOS technology. However, the oscillator is strongly affected by thermal fluctuations as every nano-sized system, which strongly degrades its spectral coherency. To solve this issue, the most promising strategy is to mutually synchronize an array of oscillators. In order to find the best synchronization schemes, one has to better understand the synchronization of the oscillator to an external source.The present work is essentially theoretical and consists to study the synchronization of a spintronic oscillator to a microwave external signal. The dynamic equation of the magnetization (Landau-Lifshitz-Gilbert-Slonczewski equation) is transformed in a simplified complex amplitude equation, which allows to address the different synchronizations mechanisms in a unified way. In particular, we introduce the canonical forcing function of the oscillator by transforming the torques {m x ui, m x m x ui} i=x,y,z and then discuss their synchronization properties.…

Advisors/Committee Members: Ebels, Ursula (thesis director), Buda-Prejbeanu, Liliana (thesis director).

Subjects/Keywords: Spintronique; Dynamique d'aimantation; Nanotechnologie; Synchronisation; Spintronics; Magnetization dynamcis; Nanotechnology; Synchronization; 530

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APA (6^th Edition):

Hem, J. (2018). Mécanismes de synchronisation dans les oscillateurs à transfert de spin : Synchronization mechanisms of spin transfer oscillators. (Doctoral Dissertation). Grenoble Alpes. Retrieved from http://www.theses.fr/2018GREAY005

Chicago Manual of Style (16^th Edition):

Hem, Jérôme. “Mécanismes de synchronisation dans les oscillateurs à transfert de spin : Synchronization mechanisms of spin transfer oscillators.” 2018. Doctoral Dissertation, Grenoble Alpes. Accessed August 15, 2018. http://www.theses.fr/2018GREAY005.

MLA Handbook (7^th Edition):

Hem, Jérôme. “Mécanismes de synchronisation dans les oscillateurs à transfert de spin : Synchronization mechanisms of spin transfer oscillators.” 2018. Web. 15 Aug 2018.

Vancouver:

Hem J. Mécanismes de synchronisation dans les oscillateurs à transfert de spin : Synchronization mechanisms of spin transfer oscillators. [Internet] [Doctoral dissertation]. Grenoble Alpes; 2018. [cited 2018 Aug 15]. Available from: http://www.theses.fr/2018GREAY005.

Council of Science Editors:

Hem J. Mécanismes de synchronisation dans les oscillateurs à transfert de spin : Synchronization mechanisms of spin transfer oscillators. [Doctoral Dissertation]. Grenoble Alpes; 2018. Available from: http://www.theses.fr/2018GREAY005

Cleveland State University

29. Carpino, Francesca. Quadrupole Magnetic Field-Flow Fractionation: A Novel Technique For The Characterization Of Magnetic Particles.

Degree: PhD, College of Science, 2008, Cleveland State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=csu1207595560

► In the last few decades, the development and use of nanotechnology has become of increasing importance. Magnetic nanoparticles, because of their unique properties, have been… (more)

▼ In the last few decades, the development and use of nanotechnology has become of increasing importance. Magnetic nanoparticles, because of their unique properties, have been employed in many different areas of application. They are generally made of a core of magnetic material coated with some other material to stabilize them and to help disperse them in suspension. The unique feature of magnetic nanoparticles is their response to a magnetic field. They are generally superparamagnetic, in which case they become magnetized only in a magnetic field and lose their magnetization when the field is removed. It is this feature that makes them so useful for drug targeting, hyperthermia and bioseparation. For many of these applications, the synthesis of uniformly sized magnetic nanoparticles is of key importance because their magnetic properties depend strongly on their dimensions. Because of the difficulty of synthesizing monodisperse particulate materials, a technique capable of characterizing the magnetic properties of polydisperse samples is of great importance. Quadrupole magnetic field-flow fractionation (MgFFF) is a technique capable of fractionating magnetic particles based on their content of magnetite or other magnetic material. In MgFFF, the interplay of hydrodynamic and magnetic forces separates the particles as they are carried along a separation channel. Since the magnetic field and the gradient in magnetic field acting on the particles during their migration are known, it is possible to calculate the quantity of magnetic material in the particles according to their time of emergence at the channel outlet. Knowing the magnetic properties of the core material, MgFFF can be used to determine both the size distribution and the mean size of the magnetic cores of polydisperse samples. When magnetic material is distributed throughout the volume of the particles, the derived data corresponds to a distribution in equivalent spherical diameters of magnetic material in the particles. MgFFF is unique in its ability to characterize the distribution in magnetic properties of a particulate sample. This knowledge is not only of importance to the optimization and quality control of particle preparation. It is also of great importance in modeling magnetic cell separation, drug targeting, hyperthermia, and other areas of application. Advisors/Committee Members: Williams, Dr. P.Stephen (Committee Chair), Turner, Dr. John (Advisor).

Subjects/Keywords: Chemistry; magnetization; magnetic field; PARTICLES; elution; nanoparticles; MgFFF

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APA (6^th Edition):

Carpino, F. (2008). Quadrupole Magnetic Field-Flow Fractionation: A Novel Technique For The Characterization Of Magnetic Particles. (Doctoral Dissertation). Cleveland State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=csu1207595560

Chicago Manual of Style (16^th Edition):

Carpino, Francesca. “Quadrupole Magnetic Field-Flow Fractionation: A Novel Technique For The Characterization Of Magnetic Particles.” 2008. Doctoral Dissertation, Cleveland State University. Accessed August 15, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=csu1207595560.

MLA Handbook (7^th Edition):

Carpino, Francesca. “Quadrupole Magnetic Field-Flow Fractionation: A Novel Technique For The Characterization Of Magnetic Particles.” 2008. Web. 15 Aug 2018.

Vancouver:

Carpino F. Quadrupole Magnetic Field-Flow Fractionation: A Novel Technique For The Characterization Of Magnetic Particles. [Internet] [Doctoral dissertation]. Cleveland State University; 2008. [cited 2018 Aug 15]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=csu1207595560.

Council of Science Editors:

Carpino F. Quadrupole Magnetic Field-Flow Fractionation: A Novel Technique For The Characterization Of Magnetic Particles. [Doctoral Dissertation]. Cleveland State University; 2008. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=csu1207595560

30. Lebrun, Romain. Coupled vortex dynamics in spin-torque oscillators : from resonant excitation to mutual synchronization : Vortex magnétiques couplés dans des oscillateurs à transfert de spin : de l'excitation résonante à la synchronisation mutuelle.

Degree: Docteur es, Physique, 2015, Paris Saclay

URL: http://www.theses.fr/2015SACLS233

► La découverte de la magnétorésistance géante en 1988 est considérée comme la date de naissance d’un nouveau et dynamique champ de recherche appelé l’électronique de… (more)

▼ La découverte de la magnétorésistance géante en 1988 est considérée comme la date de naissance d’un nouveau et dynamique champ de recherche appelé l’électronique de spin. La riche physique associée au transport de spin devrait révolutionner le futur de la nanoélectronique. Dans ce cadre les nano-oscillateurs à transfert de spin (STOs) se sont positionnés comme des candidats sérieux pour le développement d’une nouvelle génération de dispositifs rf basés sur l’électronique de spin.Au début de ma thèse, l’important bruit de phase des STOs restait une contrainte majeure limitant les perspectives technologiques à ce type d’oscillateurs. Dans cette thèse nous avons cherché à contrôler la dynamique des STOs et à réduire leur bruit phase en développant différentes stratégies : (i) l’optimisation des propriétés des matériaux magnétiques utilisés (ii) l’excitation de modes couplés dans des systèmes hybridés (iii) la stabilisation de la dynamique de la phase d’un STO avec un signal extérieur de référence (iv) la synchronisation mutuelle de différents oscillateurs pour améliorer la cohérence spectrale et la puissance des STOs. Nous focalisons en particulier sur le cas de STO à base de vortex magnétique qui présentent intrinsèquement des cohérences spectrales plus élevées que celles d’autres types d’oscillateurs.Dans une première partie, nous nous proposons d’identifier et d’étudier les différents mécanismes qui régissent et contrôle la dynamique d’un STO à base de vortex magnétique dans les régimes auto-oscillant et non-autonomes. Nous mettons tout d’abord en évidence que l’excitation de modes couplés permet de contrôler les propriétés rf d’un oscillateur unique en prenant l’exemple d’un STO à base de deux vortex magnétiques couplés. Par la suite, nous étudions la synchronisation « parfaite » de ces STOs à base de vortex avec un courant rf de référence. Nous corrélons l’observation d’une largeur de raie d’un hertz et d’un bruit de phase minimum de -90 dBc/Hz à 1kHz de la porteuse dans l’état synchronisé à une absence de glissement de phase, i.e. à l’absence de phénomène de désynchronisation. Le fort couple de Field-like planaire mesuré dans ces STOs représente un outil précieux pour contrôler le processus de synchronisation. Dans le cas des STOs à double vortex, un tel contrôle nous permet d’observer des phénomènes physiques exotiques allant de la synchronisation simultanée de plusieurs modes, à de l’auto-synchronisation en passant par des dynamiques de synchronisation incohérentes.Dans une seconde partie, nous proposons différents concepts innovants de dispositifs rf à base de vortex magnétique. Nous présentons tout d’abord les bases d’une boucle à retard de phase permettant d’asservir un STO. En prenant avantage du fort couple de Field Like, nous développons un nouveau schéma de détection rf, plus efficace que les actuelles diodes Schottky, basé sur un renversement d’aimantation en expulsant réversiblement le cœur de vortex à l’aide d’un courant rf. Finalement, nous démontrons qu’il est possible de synchroniser électriquement… Advisors/Committee Members: Cros, Vincent (thesis director).

Subjects/Keywords: Spintronique; Oscillateur; Magnétisme; Synchronisation; Spintronic; Oscillator; Magnetization; Synchronization

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APA (6^th Edition):

Lebrun, R. (2015). Coupled vortex dynamics in spin-torque oscillators : from resonant excitation to mutual synchronization : Vortex magnétiques couplés dans des oscillateurs à transfert de spin : de l'excitation résonante à la synchronisation mutuelle. (Doctoral Dissertation). Paris Saclay. Retrieved from http://www.theses.fr/2015SACLS233

Chicago Manual of Style (16^th Edition):

Lebrun, Romain. “Coupled vortex dynamics in spin-torque oscillators : from resonant excitation to mutual synchronization : Vortex magnétiques couplés dans des oscillateurs à transfert de spin : de l'excitation résonante à la synchronisation mutuelle.” 2015. Doctoral Dissertation, Paris Saclay. Accessed August 15, 2018. http://www.theses.fr/2015SACLS233.

MLA Handbook (7^th Edition):

Lebrun, Romain. “Coupled vortex dynamics in spin-torque oscillators : from resonant excitation to mutual synchronization : Vortex magnétiques couplés dans des oscillateurs à transfert de spin : de l'excitation résonante à la synchronisation mutuelle.” 2015. Web. 15 Aug 2018.

Vancouver:

Lebrun R. Coupled vortex dynamics in spin-torque oscillators : from resonant excitation to mutual synchronization : Vortex magnétiques couplés dans des oscillateurs à transfert de spin : de l'excitation résonante à la synchronisation mutuelle. [Internet] [Doctoral dissertation]. Paris Saclay; 2015. [cited 2018 Aug 15]. Available from: http://www.theses.fr/2015SACLS233.

Council of Science Editors:

Lebrun R. Coupled vortex dynamics in spin-torque oscillators : from resonant excitation to mutual synchronization : Vortex magnétiques couplés dans des oscillateurs à transfert de spin : de l'excitation résonante à la synchronisation mutuelle. [Doctoral Dissertation]. Paris Saclay; 2015. Available from: http://www.theses.fr/2015SACLS233

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Open Access Theses and Dissertations