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arXiv · 1807.04918

Free-Layer-Thickness-dependence of the Spin Galvanic Effect with Spin Rotation Symmetry

Wafa S. Aljuaid·Shane R. Allen·Angie Davidson·Xin Fan
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Abstract

Spin-orbit coupling near the surface of a ferromagnetic metal gives rises to spin-to-charge conversion with symmetry different from the conventional inverse spin Hall effect. We have previously observed this spin galvanic effect with spin rotation symmetry (SGE-SR) in a spin valve under a temperature gradient. Here we show there are two processes that contribute to the SGE-SR, one of which is sensitive to the free magnetic layer thickness, while the other only depends on the interface of the free layer. Based on the free-layer-thickness-dependent study, we extrapolate the spin diffusion length of Py to be 3.9+/-0.2 nm. We also propose that the SGE-SR can help to quantitatively study the spin Seebeck effect in metallic magnetic films.

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Wafa S. Aljuaid, Shane R. Allen, Angie Davidson, Xin Fan. 2018-07-13. Free-Layer-Thickness-dependence of the Spin Galvanic Effect with Spin Rotation Symmetry. https://doi.org/10.1063/1.5048012

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