Ilya Krivorotov

picture of Ilya  Krivorotov

Professor, Physics & Astronomy
School of Physical Sciences

Ph.D., University of Minnesota, 2002, Physics

Phone: (949) 824-6967
Fax: (949) 824-2174

University of California, Irvine
310E Rowland Hall
Irvine, CA 92697
Research Interests
Nanoelectronics and nanospintronics, spin dynamics in magnetic nanostructures.
Cornell University 2002-2005
Research Abstract
Recent advances in nanofabrication have opened new opportunities for studies of fundamental properties of matter at the nanometer length scale and for utilizing these properties in new types of electronic devices. My research interests are focused on new physical phenomena resulting from the interactions between magnetic, electronic and lattice degrees of freedom in lithographically-defined and self-assembled nanostructures.

Examples of such research topics include spin currents and spin angular momentum transfer in ferromagnetic nanostructures, magnetization dynamics of nanomagnets, proximity effect in ferromagnet/superconductor systems, domain wall motion in ferromagnetic nanowires, and non-equilibrium magnetic phase transitions driven by spin-polarized current.

This research relies on design and development of new nanoscale electronic devices using state-of-the-art nanofabrication techniques. Experimental measurements of electronic processes in these nanodevices are typically carried out with sub-nanosecond time resolution at cryogenic temperatures. This research also involves growth of thin films and multilayers using high-vacuum deposition equipment.
Zheng Duan, Andrew Smith, Liu Yang, Brian Youngblood, J. Lindner, V. E. Demidov, S. O. Demokritov and Ilya N. Krivorotov, “Nanowire Spin Torque Oscillator Driven by Spin Orbit Torques”, Nat. Commun. 5, 5616 (2014).
I. Barsukov, Yu Fu, A. M. Goncalves, M. Spasova, M. Farle, L. C. Sampaio, R. E. Arias, I. N. Krivorotov, “Field-dependent perpendicular magnetic anisotropy in CoFeB thin films”, Appl. Phys. Lett. 105, 152403 (2014).
Alejandro A. Jara, Christopher Safranski, Ilya N. Krivorotov, Chien-Te Wu, Abdul N. Malmi-Kakkada, Oriol T. Valls, and Klaus Halterman, “Angular dependence of superconductivity in superconductor / spin valve heterostructures”, Phys. Rev. B 89, 184502 (2014).
A. M. Gonçalves, I. Barsukov, Y.-J. Chen, L. Yang, J. A. Katine, I. N. Krivorotov, “Spin torque ferromagnetic resonance with magnetic field modulation”, Appl. Phys. Lett. 103, 172406 (2013).
Graham E. Rowlands, Jian Zhu, Jordan A. Katine, Juergen Langer, Ilya N. Krivorotov “Time Domain Mapping of Spin Torque Oscillator Effective Energy”, Phys. Rev. Lett. 111, 087206 (2013).
X. Cheng, J. A. Katine, G. Rowlands, I. N. Krivorotov, “Nonlinear ferromagnetic resonance induced by spin torque in nanoscale magnetic tunnel junctions”, Appl. Phys. Lett. 103, 082402 (2013).
Jian Zhu, Jordan A. Katine, Graham E. Rowlands, Yu-Jin Chen, Zheng Duan, Juan Alzate, Pramey Upadhyaya, Juergen Langer, Pedram Khalili Amiri, Kang L. Wang, and Ilya N. Krivorotov, “Voltage-Induced Ferromagnetic Resonance in Magnetic Tunnel Junctions”, Phys. Rev. Lett. 108, 197203 (2012).
Graham E. Rowlands, Tozur Raman, Jordan Katine, Andrew Lyle, Hui Zhao, Juan G. Alzate, Alexey Kovalev, Yaroslav Tserkovnyak, Zhongming Zheng, Hong-Wen Jiang, Kos Galatsis, Pedram Khalili Amiri, Kang L. Wang, Ilya Krivorotov, Jian-Ping Wang, “Deep sub-nanosecond spin torque switching in magnetic tunnel junctions with combined in-plane and perpendicular polarizers”, Appl. Phys. Lett. 98, 102509 (2011).
J. Zhu, I. N. Krivorotov, K. Halterman, O. T. Valls, “Angular Dependence of the Superconducting Transition Temperature in Ferromagnet-Superconductor-Ferromagnet Trilayers”, Phys. Rev. Lett. 105, 207002 (2010).
X. Cheng, C. T. Boone, J. Zhu, I. N. Krivorotov, “Nonadiabatic Stochastic Resonance of a Nanomagnet Excited by Spin Torque”, Phys. Rev. Lett. 105, 047202 (2010).
C. T. Boone, I. N. Krivorotov, “Magnetic Domain Wall Pumping by Spin Transfer Torque”, Phys. Rev. Lett. 104, 167205, (2010).
C. T. Boone, J. A. Katine, M. Carey, J. R. Childress, X. Cheng, I. N. Krivorotov, “Rapid Domain Wall Motion in Permalloy Nanowires Excited by Spin-Polarized Current Applied Perpendicular to the Nanowire”, Phys. Rev. Lett. 104, 097203, (2010).
C.T. Boone, J. A. Katine, J. R. Childress, V. Tiberkevich, A. Slavin, J. Zhu, X. Cheng, I. N. Krivorotov, “Resonant Nonlinear Damping of Quantized Spin Waves in Ferromagnetic Nanowires: A Spin Torque Ferromagnetic Resonance Study”, Phys. Rev. Lett. 103, 167601 (2009).
J. Zhu, X. Cheng, C. Boone, I. N. Krivorotov, “Origin of the Inverse Spin Switch Effect in Superconducting Spin Valves”, Phys. Rev. Lett. 103, 027004 (2009).
C. Boone, J. A. Katine, J. R. Childress, J. Zhu, X. Cheng, I. N. Krivorotov, “Experimental test of an analytical theory of spin-torque-oscillator dynamics”, Phys. Rev. B 79 (RC), 140404(R) (2009).
Professional Societies
American Physical Society
IEEE Magnetics Society
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