Evaluation of the spin diffusion length of AuW alloy by spin absorption experiments in the limit of large spin-orbit interactions

2015/07/16 by P. Laczkowski, H. Jaffrès, Laczkowski, P. +28
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Magnetic properties of thin films #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Physics of Superconductivity and Magnetism #cond-mat.mes-hall

paper · pdf · doi:10.48550/arxiv.1507.04567

openalex publication_date 2015/07/16 · arxiv created 2015/10/27 · arxiv updated 2015/10/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The knowledge of the spin diffusion length λ_A is a prerequisite for the estimation of the spin Hall angle. We investigate spin current absorption of materials with small λ_A using AuW stripes inserted in lateral spin-valves. Width variations of the AuW stripe lead to drastic changes of the spin absorption, which cannot be explained by conventional analysis. We show that the spin-current polarization and the spin accumulation attenuation in the vicinity of the spin absorber must to be precisely taken into account for accurate estimation of λ_A. We propose an analytical model supported by numerical calculations that allows to extract proper λ_A values of spin Hall effect materials.

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