Operating characteristics of the vortex spin transfer nano-oscillator

P.A. Stremoukhov; A.R. Safin; N.N. Udalov

Operating characteristics of the vortex spin transfer nano-oscillator

P.A. Stremoukhov¹, A.R. Safin², N.N. Udalov³

research article Pages: 19-26

¹ Student, Department of Formation and Processing of Radio Signals, «National Research University «MPEI» (Moscow)
² Ph. D. (Eng.), Associate Professor, Department of Formation and Processing of Radio Signals, «National Research University «MPEI» (Moscow)
³ Dr. Sc. (Eng.), Professor, Department of Formation and Processing of Radio Signals, «National Research University «MPEI» (Moscow)

Keywords: spin transfer vortex nano-oscillator vortex dynamics power optimization

Abstract

Based on the Thiele equation for the vortex spin transfer nano-oscillator (STNO) we obtaine truncated equations for the output amplitude and phase of the oscillator. On the basis of the resistive equivalent circuit we consider operating characteristics of the STNO and find the optimal parameter values satisfying the maximum output power at the load. Based on this model it we find the tuning frequency range of STNO. These characteristics are in qualitative agreement with the experimental results.

How to cite

Стремоухов П.А., Сафин А.Р., Удалов Н.Н. Рабочие характеристики вихревого спин-трансферного наноосциллятора // Радиотехника. 2016. № 11. С. 19–26.

References

Slonczewski J.C. Current-driven excitation of magnetic multilayers // Journal of Magnetism and Magnetic Materials. 1996. 159. L1−L7.
Berger L. Emission of spin waves by a magnetic multilayer traversed by a current // Physical review B. 1996. 54. № 13. 9353−9358.
Slavin A., Tiberkevich V. Nonlinear Auto-Oscillator Theory of Microwave Generation by Spin-Polarized Current // IEEE Trans. Mag. 2009. 45. 1875−1918.
Grollier J., Cros V., Fert A. Synchronization of spin-transfer oscillators driven by stimulated microwave currents // Physical review B. 2006. 73. 060409(R).
Safin A.R., Udalov N.N., Kapranov M.V. Mutual phase locking of very nonidentical spin torque nanooscillators via spin wave interaction// Eur. Phys. J. Appl. Phys. 2014. 67. 20601.
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Junyeon Kim & Sug-Bong Choe. Simple harmonic oscillation of ferromagnetic vortex core // Journal of Magnetics. 2007. 12(3). 113−117.
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Skirdkov P.N., Zvezdin K.A., Belanovsky A.D., George J.M., Wu J.C., Cros V., Zvezdin A.K. Large amplitude vortex gyration in permalloy/Bi2Se3-like heterostructures // Physical review B. 2015. 92. 094432.

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[1] Slonczewski J.C. Current-driven excitation of magnetic multilayers // Journal of Magnetism and Magnetic Materials. 1996. 159. L1−L7.

[2] Berger L. Emission of spin waves by a magnetic multilayer traversed by a current // Physical review B. 1996. 54. № 13. 9353−9358.

[3] Slavin A., Tiberkevich V. Nonlinear Auto-Oscillator Theory of Microwave Generation by Spin-Polarized Current // IEEE Trans. Mag. 2009. 45. 1875−1918.

[4] Grollier J., Cros V., Fert A. Synchronization of spin-transfer oscillators driven by stimulated microwave currents // Physical review B. 2006. 73. 060409(R).

[5] Safin A.R., Udalov N.N., Kapranov M.V. Mutual phase locking of very nonidentical spin torque nanooscillators via spin wave interaction// Eur. Phys. J. Appl. Phys. 2014. 67. 20601.

[6] Belanovsky A.D., Locatelli N., Skirdkov P.N., Abreu Araujo F., Zvezdin K.A., Grollier J., Cros V., Zvezdin A.K. // Appl. Phys. Lett. 2013. 103. 122405.

[7] Junyeon Kim & Sug-Bong Choe. Simple harmonic oscillation of ferromagnetic vortex core // Journal of Magnetics. 2007. 12(3). 113−117.

[8] Gaididei Yuri, Kravchuk Volodymyr, Sheka Denis. Magnetic vortex dynamics induced by an electrical current // International Journal of Quantum Chemistry. 2009. V. 110. 83−97.

[9] Khvalkovskiy A.V., Grollier J., Dussaux A., Zvezdin K.A., Cros V. Vortex oscillations induced by spin-polarized current in a magnetic nanopillar: Analytical versus micromagnetic calculations // Physical review B. 2009. 80. 140401(R).

[10] Skirdkov P.N., Zvezdin K.A., Belanovsky A.D., George J.M., Wu J.C., Cros V., Zvezdin A.K. Large amplitude vortex gyration in permalloy/Bi2Se3-like heterostructures // Physical review B. 2015. 92. 094432.