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

Authors
Ryu, JisuLee, Kyung-JinLee, Hyun-Woo
Issue Date
29-4월-2013
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.102, no.17
Indexed
SCIE
SCOPUS
Journal Title
APPLIED PHYSICS LETTERS
Volume
102
Number
17
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/103472
DOI
10.1063/1.4803665
ISSN
0003-6951
Abstract
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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