Inverse spin Hall effect (ISHE) allows the conversion of pure spin current into charge current in nonmagnetic materials (NM) due to spin-orbit interaction (SOI). In ferromagnetic materials (FM), SOI is known to contribute to anomalous Hall effect (AHE), anisotropic magnetoresistance (AMR), and other spin-dependent transport phenomena. However, SOI in FM has been ignored in ISHE studies in spintronic devices, and the possibility of "self-induced ISHE" in FM has never been explored until now. In this paper, we demonstrate the experimental verification of ISHE in FM. We found that the spin-pumping-induced spin current in permalloy (Py) film generates a transverse electromotive force (EMF) in the film itself, which results from the coupling of spin current and SOI in Py. The control experiments ruled out spin rectification effect and anomalous Nernst effect as the origin of the EMF.
@article{arxiv.1301.3580,
title = {Self-induced inverse spin Hall effect in permalloy at room temperature},
author = {Ayaka Tsukahara and Yuichiro Ando and Yuta Kitamura and Hiroyuki Emito and Eiji Shikoh and Michael P. Delmo and Teruya Shinjo and Masashi Shiraishi},
journal= {arXiv preprint arXiv:1301.3580},
year = {2015}
}
Comments
28 page, 5 figures, supplemental information (To appear in Physical Review B (Regular Article))