Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jmmm.2006.01.066
Title: Theoretical model of spin transfer torque in multilayers
Authors: Jalil, M.B.A. 
Tan, S.G.
Keywords: Current-induced magnetization switching
Spin absorption
Spin current
Spin transfer torque
Issue Date: Aug-2006
Citation: Jalil, M.B.A., Tan, S.G. (2006-08). Theoretical model of spin transfer torque in multilayers. Journal of Magnetism and Magnetic Materials 303 (2 SPEC. ISS.) : 333-337. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jmmm.2006.01.066
Abstract: We present a model of spin transport in a Co/Cu(1 1 1)/Co pseudo-spin-valve (PSV) structure where current is flowing in the current perpendicular-to-plane (CPP) geometry. The model considers ballistic spin-dependent transmission at the two Co-Cu interfaces, as well as diffusive spin relaxation within the Cu spacer and free Co layer. In the latter, the spin relaxation process is composed of the usual longitudinal spin relaxation due to spin flip scattering, as well as transverse spin relaxation due to spin precession. The resulting spin transfer torque exerted on the moments within the free Co layer is composed of two contributions, the main contribution coming from "absorbed" spins in the interfacial regions. The second contribution arises from the relaxation of spin accumulation within the free Co layer. The calculated critical current density for switching is estimated to be approximately between 3.3×107 and 1.1×108 A/cm2, which is in agreement with available experimental results. © 2006 Elsevier B.V. All rights reserved.
Source Title: Journal of Magnetism and Magnetic Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/83183
ISSN: 03048853
DOI: 10.1016/j.jmmm.2006.01.066
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