Current-induced magnetic vortex motion by spin-transfer torque

被引：106
|
作者：
Shibata, J
Nakatani, Y
Tatara, G
Kohno, H
Otani, Y
机构：
[1] RIKEN, FRS, Wako, Saitama 3510198, Japan
[2] JST, CREST, Kawaguchi, Saitama, Japan
[3] Univ Electrocommun, Chofu, Tokyo 1828585, Japan
[4] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo 1920397, Japan
[5] JST, PRESTO, Kawaguchi, Saitama, Japan
[6] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan
[7] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
[8] RIKEN, FRS, Wako, Saitama 3510198, Japan
[9] JST, CREST, Kawaguchi, Saitama, Japan
来源：
PHYSICAL REVIEW B | 2006年 / 73卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.73.020403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate the dynamics of a magnetic vortex driven by spin-transfer torque due to spin current in the adiabatic case. The vortex core represented by collective coordinate experiences a transverse force proportional to the product of spin current and gyrovector, which can be interpreted as the geometric force determined by topological charges. We show that this force is just a reaction force of Lorentz-type force from the spin current of conduction electrons. Based on our analyses, we propose analytically and numerically a possible experiment to check the vortex displacement by spin current in the case of single magnetic nanodot.
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页数：4
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