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

We perform electrical 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...

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Bibliographic Details
Published in:Applied physics letters 2018-08, Vol.113 (6)
Main Authors: Borisenko, I. V., Demidov, V. E., Urazhdin, S., Rinkevich, A. B., Demokritov, S. O.
Format: Article
Language:English
Subjects:
Applied physics
Dependence
Electrical measurement
Ferrous alloys
Magnetic alloys
Magnetoresistance
Magnetoresistivity
Magnons
Spintronics
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Summary:We perform electrical 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 dependences 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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5044737