Magnetic Domain Wall Pumping by Spin Transfer Torque

被引：18
|
作者：
Boone, C. T. [1 ]
Krivorotov, I. N. [1 ]
机构：
[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 16期
关键词：
MOTION; EXCITATION; RESONANCE;
D O I：
10.1103/PhysRevLett.104.167205
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We show that spin transfer torque from a direct spin-polarized current applied parallel to a magnetic domain wall (DW) induces DW motion in a direction independent of the current polarity. This unidirectional response of the DW to spin torque enables DW pumping-long-range DW displacement driven by an alternating current. Our numerical simulations reveal that DW pumping can be resonantly amplified through excitation of internal degrees of freedom of the DW by the current.
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页数：4
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