Highly nonlinear frequency-dependent spin-wave resonance excited via spin-vorticity coupling

Kurimune, Yuki*; Matsuo, Mamoru; Maekawa, Sadamichi; Nozaki, Yukio*

A nonuniform vorticity of lattice deformation in a surface acoustic wave (SAW) can generate a spin current (SC) in nonmagnetic metals via spin-vorticity coupling (SVC). We demonstrated a strong enhancement of SVC derived SC generated in Cu and Pt films with increasing the frequency of the SAW by observing the spin-wave resonance (SWR) in an adjacent NiFe film. The comparative amplitudes and high-order frequency variations of SWR in NiFe/Cu and NiFe/Pt bilayers imply that the amplitude of the SC generated via SVC in a SAW is robust against the strength of spin-orbit interaction in nonmagnetic metals.

Language	:	English
Journal	:	Physical Review B
Volume	:	102
Number	:	17
Pages	:	p.174413_1 - 174413_7
Publication Year/Month	:	2020/11
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Paper URL	:	https://doi.org/10.1103/PhysRevB.102.174413
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Keywords	:	no keyword
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Registration No. : AA20220614
JAEA Abstracts No. : 51000680
Paper Submission No. : 26605

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