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arXiv · 1409.1290

Detection of the dc inverse spin Hall effect due to spin pumping in a novel meander-stripline geometry

Mathias Weiler·Justin M. Shaw·Hans T. Nembach·Thomas J. Silva
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Abstract

The dc voltage obtained from the inverse spin Hall effect (iSHE) due to spin pumping in ferromagnet/normal-metal (NM) bilayers can be unintentionally superimposed with magnetoresistive rectification of ac charge currents in the ferromagnetic layer. We introduce a geometry in which these spurious rectification voltages vanish while the iSHE voltage is maximized. In this geometry, a quantitative study of the dc iSHE is performed in a broad frequency range for Permalloy/NM multilayers with NM={Pt, Ta, Cu/Au, Cu/Pt}. The experimentally recorded voltages can be fully ascribed to the iSHE due to spin pumping. Furthermore we measure a small iSHE voltage in single CoFe thin films.

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Mathias Weiler, Justin M. Shaw, Hans T. Nembach, Thomas J. Silva. 2014-09-04. Detection of the dc inverse spin Hall effect due to spin pumping in a novel meander-stripline geometry. https://doi.org/10.1109/lmag.2014.2361791

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