Observation of Nonlinear Coupled Photon-Magnon Oscillations in YIG

Qingfan Shi, Michinobu Mino, Vladimir L. Safonov, Hitoshi Yamazaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Nonequilibrium spin waves excited by the parallel pumping in an yttrium iron garnet placed in a microwave cavity was studied by means of additional weak microwave signal. The response of the probe signal represented a two-hump spectrum just above the threshold of parametric instability. It corresponds to mixed oscillations of photons and magnons and demonstrates that the parametric spin-wave pair behaves as a single-mode oscillator nonlinearly coupled with the electromagnetic mode of microwave cavity. We observed another splitting in the spectrum before the onset of auto-oscillations. It is assumed to indicate that this steady state of parametric system consists of two different parametric spin-wave pairs. Theoretical calculations which consider coupled systems of resonator mode and magnetic sample are found to be in good agreement with the experimental data.

Original languageEnglish
Pages (from-to)3283-3287
Number of pages5
Journaljournal of the physical society of japan
Volume67
Issue number9
DOIs
Publication statusPublished - Sep 1998

Keywords

  • Magnon
  • Nonlinear coupling
  • Parallel pumping
  • Parametric pair
  • Spin wave
  • YIG

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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