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Calculation of spin transfer torque in partially polarized spin valves including multiple reflections

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2 Author(s)
Hernandez, Stephanie ; The Center for Micromagnetic and Information Technologies, Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA ; Victora, R.H.

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An analytic expression that includes the effect of multiple reflections within the interface of a spin-valve composed of materials with partial spin polarization was obtained. Inclusion of this term in a micromagnetic calculation demonstrates the effect of the spin polarization of the magnetic material on the current induced behavior of the structure. We show that neglecting to include interfacial scattering events results in an underestimation of the switching current compared to the method detailed in this letter. Multiple reflections also produce a strong dependence of the switching current on the magnetocrystalline anisotropy of the fixed layer.

Published in:

Applied Physics Letters  (Volume:97 ,  Issue: 6 )