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arXiv · 2001.11520

Disorder Dependence of Interface Spin Memory Loss

Kriti Gupta·Rien J. H. Wesselink·Ruixi Liu·Zhe Yuan·Paul J. Kelly
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Abstract

The discontinuity of a spin-current through an interface caused by spin-orbit coupling is characterized by the spin memory loss (SML) parameter δ. We use first-principles scattering theory and a recently developed local current scheme to study the SML for Au|Pt, Au|Pd, Py|Pt and Co|Pt interfaces. We find a minimal temperature dependence for nonmagnetic interfaces and a strong dependence for interfaces involving ferromagnets that we attribute to the spin disorder. The SML is larger for Co|Pt than for Py|Pt because the interface is more abrupt. Lattice mismatch and interface alloying strongly enhance the SML that is larger for a Au|Pt than for a Au|Pd interface. The effect of the proximity induced magnetization of Pt is negligible.

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Kriti Gupta, Rien J. H. Wesselink, Ruixi Liu, Zhe Yuan, Paul J. Kelly. 2020-01-30. Disorder Dependence of Interface Spin Memory Loss. https://doi.org/10.1103/physrevlett.124.087702

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