Journal
PHYSICAL REVIEW B
Volume 104, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.104.L020404
Keywords
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Funding
- JSPS KAKENHI [JP18H03867, JP20H01863, JP21H04565]
- JST CREST [JPMJCR19J4]
- Japan the Priority Program of the Chinese Academy of Sciences [XDB28000000]
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The study demonstrates the phase shift of the Rayleigh-type surface acoustic wave (RSAW) in a ferromagnetic Ni81Fe19 film based on the gyromagnetic Einstein-de Haas (EdH) torque, which can be significantly enhanced by increasing frequency and provides a new pathway for controlling spin-mechatronics devices.
We demonstrate the phase shift of the Rayleigh-type surface acoustic wave (RSAW) in a ferromagnetic Ni81Fe19 film based on the gyromagnetic Einstein-de Haas (EdH) torque that can be attributed to the back action of spin-wave excitation. The EdH torque modulates the transverse velocity of the bulk acoustic wave that causes the bipolar phase shift of RSAW. When compared with a magnetoelastic torque, the phase shift can be more prominently enhanced by increasing the frequency. The gyromagnetic torque in the RSAW paves the way for controlling spin-mechatronics devices without magnetoelastic torque which is specific to a certain material.
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