Effect of ac on current-induced domain wall motion

被引：0
|
作者：
Kim, W.J. [1 ]
Lee, T.D. [1 ]
Choa, S.H. [2 ]
Seo, S.M. [3 ]
Lee, K.J. [3 ]
机构：
[1] Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Republic of
[2] Semiconductor Device and Materials Laboratory, Samsung Advanced Institute of Technology, Suwon 449-712, Korea, Republic of
[3] Department of Materials Science and Engineering, Korea University, Seoul 136-701, Korea, Republic of
来源：
Journal of Applied Physics | 2007年 / 101卷 / 09期
关键词：
Saitoh; Nature; (London); 432; 203 (2004)] have reported the experimental result showing the interplay of a transverse domain wall with an electrical ac of megahertz-range frequencies. They observed a single peak of resistance in the frequency range and interpreted it with a nonadiabatic spin torque. It was argued that an ac current can induce a micrometer-range displacement of domain wall. We reconstructed the experiment in micromagnetic simulations considering the local nonzero nonadiabatic spin torque. We could not observe either an explicit single peak in the frequency-dependent resistance or an eventual displacement of domain wall by use of an ac. It indicates the local nonadiabatic torque is inappropriate to explain the experimental results of ac-induced domain wall motion. Other approaches such as the nonlocal nonadiabatic spin torque may be needed. © 2007 American Institute of Physics;
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