4.6 Article

Dispersive readout of ferromagnetic resonance for strongly coupled magnons and microwave photons

Journal

PHYSICAL REVIEW B
Volume 91, Issue 10, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.91.104410

Keywords

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Funding

  1. Hitachi Cambridge Laboratory
  2. EPSRC [EP/K027018/1]
  3. Hitachi Research fellowship
  4. ARC via the Centre of Excellence in Engineered Quantum Systems (EQuS) [CE110001013]
  5. EPSRC [EP/K027018/1] Funding Source: UKRI
  6. Engineering and Physical Sciences Research Council [EP/K027018/1] Funding Source: researchfish

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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 nonlinearity in magnetization dynamics, indicating a promising route towards experiments in magnon cavity quantum electrodynamics.

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