Current-induced motion of a transverse magnetic domain wall in the presence of spin Hall effect
SCIE
SCOPUS
- Title
- Current-induced motion of a transverse magnetic domain wall in the presence of spin Hall effect
- Authors
- Seo, SM; Kim, KW; Ryu, J; Lee, HW; Lee, KJ
- Date Issued
- 2012-07-09
- Publisher
- AMER INST PHYSICS
- Abstract
- We theoretically study current-induced dynamics of a transverse magnetic domain wall in bi-layer nanowires consisting of a ferromagnetic layer on top of a nonmagnetic layer with strong spin-orbit coupling. Domain wall dynamics is characterized by two threshold current densities, J(th)(WB) and J(th)(REV), where J(th)(WB) is a threshold for the chirality switching of the domain wall and J(th)(REV) is another threshold for the reversed domain wall motion caused by spin Hall effect. Domain walls with a certain chirality may move opposite to the electron-flow direction with high speed in the current range J(th)(REV) < J < J(th)(WB) for the system designed to satisfy the conditions J(th)(WB) > J(th)(REV) and alpha > beta, where alpha is the Gilbert damping constant and beta is the nonadiabaticity of spin torque. Micromagnetic simulations confirm the validity of analytical results. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4733674]
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/9752
- DOI
- 10.1063/1.4733674
- ISSN
- 0003-6951
- Article Type
- Article
- Citation
- APPLIED PHYSICS LETTERS, vol. 101, no. 2, page. 22405, 2012-07-09
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