University of Minnesota
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Randall H Victora

Graduate Faculty (Electrical Engineering)

KHKH 6-157 (office), 625-1825
victo004 @ umn.edu

Victora, Randall H.jpeg

2014 Magnetics Society Achievement Award, 2016 UMN Outstanding Contributions to Postbaccalaureate, Graduate and Professional Education Award, Fellow American Physical Society, Fellow IEEE.

President, IEEE Magnetics Society, 2009-2010, General Chairman, 50th Annual Conference on Magnetism and Magnetic Materials, 2005, Program Co-Chairman, Joint MMM-INTERMAG Conference, 2001, Program Co-Chairman, INTERMAG 1995, Publications Co-Chairman of MMM Conference and Guest Editor of Journal of Applied Physics, 1992-1993,

Summary of Interests
The theoretical study of magnetism and magnetics, particularly for application to magnetic recording and other magnetic devices. This work includes micromagnetic simulation, calculation of electronic structure, and analytic theory. [Research Web Page]

About My Work

I am primarily interested in the theoretical study of magnetism and magnetics, particularly for application to spintronics and magnetic recording, with occasional forays into biomagnetism and interactions with microwaves. Techniques employed include micromagnetic simulation, calculation of electronic structure, Finite Difference Time Domain (FDTD), and analytic theory. Special interests include composite structures employed for spintronics and magnetic recording media: some of our contributions have enjoyed wide commercial success. Other recent interests have included spin transport, e.g., magnetoresistance, ferromagnetic damping, and magnetic structure near the Curie temperature.

Selected Publications

Z. Liu, Y. Jiao, and R.H. Victora, Composite Media for High Density Heat Assisted Magnetic Recording, Appl. Phys. Lett. 108, 232402 (2016)

R. Bell, J. Hu, and R. H. Victora, Dual Referenced Composite Free Layer Design for Improved Switching Efficiency of Spin-Transfer Torque Random Access Memory, IEEE Electron Device Letters 37, 1108 (2016)

A. Yu. Dobin and R.H. Victora, Surface Roughness Induced Extrinsic Damping in Thin Magnetic Films, Phys. Rev. Lett. 92, 257204, 2004

Z. Wang and R.H. Victora, Enhancement of Giant Magnetoresistance and Oscillation by Wave-vector Filtering in Fe/Ag/Fe/InAs/Ag, Phys. Rev. B 94, 245415 (2016)

T. Qu and R.H. Victora, Effect of Substitutional Defects on Kambersky Damping in L10 Magnetic Materials, Appl. Phys. Lett. 106, 072404 (2015)

T. Qu and R.H. Victora, Phase-Lock Requirements in a Serial Array of Spin Transfer Nano-Oscillators, Scientific Reports (Nature) 5, 11462 (2015)

X. Chen and R.H. Victora, Phase locking of Spin Torque Oscillators by Spin Wave Interactions, Phys. Rev. B 79, 180402(R) (2009)

A. Ghoreyshi and R.H. Victora, Optical Modeling of Media for Heat Assisted Magnetic Recording, Appl. Phys. Lett. 108, 092401 (2016)

D.E. Endean, C.T. Weigelt, R.H. Victora, and E.D. Dahlberg, Tunable Random Telegraph Noise in Individual Square Permalloy Dots, Appl. Phys. Lett. 104, 252408 (2014)

Education

B.S. (physics and mathematics) Massachusetts Institute of Technology 1980
Ph.D. (physics) University of California, Berkeley, 1985