Inverse Spin Hall Effect in a Ferromagnetic Metal

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Inverse Spin Hall Effect in a Ferromagnetic Metal

B. F. Miao, S. Y. Huang, D. Qu, and C. L. Chien

Phys. Rev. Lett. 111, 066602 – Published 5 August 2013

Abstract

The inverse spin Hall effect (ISHE) has been observed only in nonmagnetic metals, such as Pt and Au, with a strong spin-orbit coupling. We report the observation of ISHE in a ferromagnetic permalloy (Py) on ferromagnetic insulator yttrium iron garnet (YIG). Through controlling the spin current injection by altering the Py-YIG interface, we have isolated the spin current contribution and demonstrated the ISHE in a ferromagnetic metal, the reciprocal phenomenon of the anomalous Hall effect. A large spin Hall angle in Py, determined from Py thin films of different thicknesses, indicates many other ferromagnetic metals may be exploited as superior pure spin current detectors and for applications in spin current.

Received 30 May 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.066602

Authors & Affiliations

B. F. Miao^1,2, S. Y. Huang¹, D. Qu¹, and C. L. Chien^1,*

¹Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA
²National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China