1. Control of the Magnon–Photon Coupling.
- Author
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Bai, Lihui, Blanchette, K., Harder, M., Chen, Y. P., Fan, X., Xiao, J. Q., and Hu, C. -M.
- Subjects
MAGNONS ,ELECTRODYNAMICS ,PHOTONS ,FERROMAGNETIC resonance ,LANDAU-lifshitz equation ,SPINTRONICS - Abstract
A systematic study of the electrodynamic coupling between the ferromagnetic resonance (FMR) and the cavity mode of a microwave cavity is presented. The nature of the FMR and cavity modes, described by their resonance position and line width, is measured and compared with a classical model based on the Landau–Lifshitz–Gilbert equation and an RLC circuit, which explicitly implement Faraday’s and Ampère’s laws. The relationship between the coupling gap, which can be accessed experimentally, and the coupling strength, which is a fundamental property of the FMR/cavity system, is discussed on the basis of this model. A straightforward method is experimentally developed to control the coupling gap. The capability of using such a tunable cavity-FMR coupling in combination with spin pumping could provide us with new technologies that utilize the light-matter interaction to control spin current in cavity spintronics. [ABSTRACT FROM PUBLISHER]
- Published
- 2016
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