Spin Wave Emitting Effect Caused by Current-induced Spin Transfer Torque in PSV

Chen Peiyi; Hu Jiuning; Zhang Lei; Ren Min; Dong Hao; Deng Ning

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Spin Wave Emitting Effect Caused by Current-induced Spin Transfer Torque in PSV

Chen Peiyi 1 * #,Hu Jiuning 2,Zhang Lei 2,Ren Min 2,Dong Hao 2,Deng Ning 2

1.Institute of Microelectronics,Tsinghua University

2.nstitute of Microelectronics,Tsinghua University

*Correspondence author

#Submitted by

Subject:

Funding: 973重大科学研究计划资助项目,自然科学基金资助项目,高等学校博士学科点专项科研基金资助项目（No.2006CB921106,60606021,20060003067）

Opened online:11 April 2008

Accepted by: none

Citation: Chen Peiyi,Hu Jiuning,Zhang Lei.Spin Wave Emitting Effect Caused by Current-induced Spin Transfer Torque in PSV[OL]. [11 April 2008] http://en.paper.edu.cn/en_releasepaper/content/20397

This article presents a magnetic dynamics description for current-induced STT in PSV, which could illuminate that the effects of SWE and CIMS in magnetic multiplayer nanostructures. The spin current polarization is determined by the continuity boundary condition of spin current and chemical potential under the case of conduction matching. The roles of longitudinal and transverse components of STT are different in magnetic multiplayer that longitudinal one generates CIMS effect, while transverse one is necessary for SWE effect. From the theory, the double spin wave modes have been naturally obtained by LLG equation, which are x mode and y mode, respectively, due to the transverse STT, and cause resistance of magnetic multiplayer altering following time with frequency 2w or w(precession frequency). Magnetic field and spin current control frequency and power of SWE according to this theory, which predicts a special device structure, for example, the perpendicular configuration, should present much higher efficiency of SWE that has been demonstrated by some experiment results.

Keywords:Spin wave emitting; Spin transfer torque; Landau-Lifshitz-Gilbert equation; Spin oscillation modes

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