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

Stephanie Hernández; R. H. Victora

doi:10.1063/1.3479533

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

Stephanie Hernández, R. H. Victora

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

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.

Original language	English (US)
Article number	062506
Journal	Applied Physics Letters
Volume	97
Issue number	6
DOIs	https://doi.org/10.1063/1.3479533
State	Published - Aug 9 2010

Bibliographical note

Funding Information:
We would like to thank Beth Stadler for useful discussions. This work was supported primarily by the MRSEC Program of the National Science Foundation under Award No. DMR-0819885 and by the University of Minnesota Supercomputing Institute.

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abstract = "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.",

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N2 - 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.

AB - 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.

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

Abstract

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