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Nonlinear magnetization dynamics excited by the spin-transfer torque effect

Wan Zhen-Mao Liu Yao-Wen Jin Wei

Nonlinear magnetization dynamics excited by the spin-transfer torque effect

Wan Zhen-Mao, Liu Yao-Wen, Jin Wei
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Publishing process
  • Received Date:  17 March 2010
  • Accepted Date:  04 May 2010
  • Published Online:  15 January 2011

Nonlinear magnetization dynamics excited by the spin-transfer torque effect

  • 1. (1)Department of Physics, Tongji University, Shanghai 200092, China; (2)Department of Physics, Tongji University, Shanghai 200092, China;College of Physics and Communication Electronics, Anhui Normal University, Wuhu 241000, China

Abstract: 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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