Current-driven domain wall motion with spin Hall effect: Reduction of threshold current density

被引：25
|
作者：
Ryu, Jisu [1 ,2 ]
Lee, Kyung-Jin [3 ,4 ]
Lee, Hyun-Woo [1 ,2 ]
机构：
[1] Pohang Univ Sci & Technol, PCTP, Pohang 790784, Kyungbuk, South Korea
[2] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, Kyungbuk, South Korea
[3] Korea Univ, Dept Mat Sci & Engn, Seoul 136701, South Korea
[4] Korea Univ, KU KIST Grad Sch Converging Sci & Technol, Seoul 136713, South Korea
来源：
APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 17期
关键词：
DYNAMICS;
D O I：
10.1063/1.4803665
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We theoretically study the current-driven domain wall motion in the presence of both the spin Hall effect and an extrinsic pinning potential. The spin Hall effect mainly affects the damping ratio of the domain wall precession in the pinning potential. When the pinning potential is not too strong, this results in a significant reduction of a threshold current density for the depinning of a domain wall with certain polarity. We also propose one way to distinguish the spin Hall effect induced spin-transfer torque from the one induced by the Rashba spin-orbit coupling experimentally. (C) 2013 AIP Publishing LLC.
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页数：4
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