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

Yuki Kurimune; Mamoru Matsuo; Sadamichi Maekawa; Yukio Nozaki

doi:10.1103/PhysRevB.102.174413

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

Yuki Kurimune, Mamoru Matsuo, Sadamichi Maekawa, Yukio Nozaki

Department of Physics

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

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.

Original language	English
Article number	174413
Journal	Physical Review B
Volume	102
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.102.174413
Publication status	Published - 2020 Nov 9

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.102.174413

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title = "Highly nonlinear frequency-dependent spin-wave resonance excited via spin-vorticity coupling",

abstract = "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.",

author = "Yuki Kurimune and Mamoru Matsuo and Sadamichi Maekawa and Yukio Nozaki",

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AU - Kurimune, Yuki

AU - Matsuo, Mamoru

AU - Maekawa, Sadamichi

AU - Nozaki, Yukio

PY - 2020/11/9

Y1 - 2020/11/9

N2 - 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.

AB - 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.

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

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