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arXiv · 1806.06581

Relation between unidirectional spin Hall magnetoresistance and spin current-driven magnon generation

I. V. Borisenko·V. E. Demidov·S. Urazhdin·A. B. Rinkevich·S. O. Demokritov
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Abstract

We perform electronic measurements of unidirectional spin Hall magnetoresistance (USMR) in a Permalloy/Pt bilayer, in conjunction with magneto-optical Brillouin light spectroscopy of spin current-driven magnon population. We show that the current dependence of USMR closely follows the dipolar magnon density, and that both dependencies exhibit the same scaling over a large temperature range of 80-400 K. These findings demonstrate a close relationship between spin current-driven magnon generation and USMR, and indicate that the latter is likely dominated by the dipolar magnons.

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I. V. Borisenko, V. E. Demidov, S. Urazhdin, A. B. Rinkevich, S. O. Demokritov. 2018-06-18. Relation between unidirectional spin Hall magnetoresistance and spin current-driven magnon generation. https://doi.org/10.1063/1.5044737

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