Threshold current for switching of a perpendicular magnetic layer induced by spin Hall effect

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We theoretically investigate the switching of a perpendicular magnetic layer by in-plane charge current due to the spin Hall effect. We find that in the high damping regime, the threshold switching current is independent of the damping constant and is almost linearly proportional to both effective perpendicular magnetic anisotropy field and external in-plane field applied along the current direction. We obtain an analytic expression of the threshold current, in excellent agreement with numerical results. Based on the expression, we find that magnetization switching induced by the spin Hall effect can be practically useful when it is combined with voltage-controlled anisotropy change. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4798288]
Publisher
AMER INST PHYSICS
Issue Date
2013-03
Language
English
Article Type
Article
Citation

APPLIED PHYSICS LETTERS, v.102, no.11

ISSN
0003-6951
DOI
10.1063/1.4798288
URI
http://hdl.handle.net/10203/277484
Appears in Collection
PH-Journal Papers(저널논문)
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