Asymmetry in effective fields of spin-orbit torques in Pt/Co/Pt stacks

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Asymmetry in effective fields of spin-orbit torques in Pt/Co/Pt stacks
Title:
Asymmetry in effective fields of spin-orbit torques in Pt/Co/Pt stacks
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APPLIED PHYSICS LETTERS
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Publication Date:
09 January 2014
Citation:
Appl. Phys. Lett. 104, 012408 (2014)
Abstract:
Measurements of switching via spin-orbit coupling mechanisms are discussed for a pair of inverted Pt/Co/Pt stacks with asymmetrical Pt thicknesses. Taking into account the planar Hall effect contribution, effective fields of spin-orbit torques (SOT) are evaluated using lock-in measurements of the first and second harmonics of the Hall voltage. Reversing the stack structure leads to significant asymmetries in the switching behavior, including clear evidence of a nonlinear current dependence of the transverse effective field. Our results demonstrate potentially complex interplay in devices with all-metallic interfaces utilizing SOT.
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Description:
Copyright (2014) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 104, 012408 (2014) and may be found at http://dx.doi.org/10.1063/1.4861459
ISSN:
0003-6951
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