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Optimizing the spin-pumping induced inverse spin Hall voltage by crystal growth in Fe/Pt bilayers

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arxiv 1309.4248 v1 pith:GDGHPFT4 submitted 2013-09-17 cond-mat.mtrl-sci

Evangelos Th. Papaioannou , Philipp Fuhrmann , Matthias B. Jungfleisch , Thomas Brächer , Philipp Pirro , Viktor Lauer , Jörg Lösch , Burkard Hillebrands This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords spinhallinverseeffectgrowthbilayersconductancecrystal
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We examine the influence of crystal growth on the spin-pumping induced inverse spin Hall effect in Fe/Pt bilayers. The morphology of the Fe/Pt interface influences the effective spin mixing conductance. The increase of growth temperature leads to smoother and larger grains at the interface that enhance the effective spin mixing conductance. The spin current injection efficiency into Pt, measured by the inverse spin Hall effect, is maximized by optimizing the epitaxy of Pt on Fe. In magnetic field dependent measurements, the presence of a strong magnetic anisotropy gives rise to two distinct inverse spin Hall effect voltage peaks.

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