Dispersive read-out of ferromagnetic resonance for strongly coupled magnons and microwave photons
arXiv:1506.05631 · doi:10.1103/PhysRevB.91.104410
Abstract
We demonstrate the dispersive measurement of ferromagnetic resonance in a yttrium iron garnet sphere embedded within a microwave cavity. The reduction in the longitudinal magnetization at resonance is measured as a frequency shift in the cavity mode coupled to the sphere. This measurement is a result of the intrinsic non-linearity in magnetization dynamics, indicating a promising route towards experiments in magnon cavity quantum electro-dynamics.
5 pages, 5 figures
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- Control of magnon-photon coupling strength in a planar resonator/YIG thin film configuration