Nonlinear magnetization dynamics excited by the spin-transfer torque effect | Zendy

Wei Jin | Zendy; Wan Zhen-Mao | Zendy; Yaowen Liu | Zendy

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Nonlinear magnetization dynamics excited by the spin-transfer torque effect

Author(s) -

Wei Jin,

Wan Zhen-Mao,

Yaowen Liu

Publication year - 2011

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.60.017502

Subject(s) - magnetization , physics , magnetization dynamics , condensed matter physics , chaotic , oscillation (cell signaling) , spin transfer torque , excited state , spin (aerodynamics) , nonlinear system , torque , current (fluid) , dynamics (music) , magnetic field , quantum mechanics , thermodynamics , artificial intelligence , biology , computer science , acoustics , genetics

The macrospin model based on Landau-Lifshitz-Gilbert equation is used to study the current-induced magnetization dynamics in magnetic spin valves. We find that the DC spin-polarized current could either switch the magnetization of free layer or excite the steady-state precessional motion via the so-called spin-transfer torque effect. The AC current could drive the chaotic oscillations. The route to chaotic oscillation depending on the strength of current is demonstrated through a series of period doubling bifurcations.

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