Gyromagnetic bifurcation in a levitated ferromagnetic particle

Feb 4, 2022
6 pages
Published in:
  • Phys.Rev.B 107 (2023) 18, L180406
  • Published: May 1, 2023
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Abstract: (APS)
We examine the mechanical rotation of a levitated magnetic particle that is induced by ferromagnetic resonance under microwave irradiation. We show that two stable solutions appear in a certain range of parameters by bifurcation when the rotation frequency is comparable to the microwave frequency. This phenomenon originates from the coexistence of the Barnett and the Einstein–de Haas effects. We also reveal that this measurement is sensitive to the strength of the spin-rotation coupling. Our work provides a platform for accessing a microscopic relaxation process from spin to macroscopic rotation.
Note:
  • 14 pages, 6 figures