The Onset of Auto-Oscillations of Parametrically Excited Spin-Wave Pairs

Michinobu Mino; Hisayuki Urakami; Vladimir L. Safonov; Keiichi Zouta; Hitoshi Yamazaki

doi:10.1143/JPSJ.67.409

The Onset of Auto-Oscillations of Parametrically Excited Spin-Wave Pairs

Michinobu Mino, Hisayuki Urakami, Vladimir L. Safonov, Keiichi Zouta, Hitoshi Yamazaki

Institute for Global Human Resource Development

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The parallel pumping of spin waves in an yttrium iron garnet (YIG) sphere placed in a microwave cavity has been performed by X-band microwaves. The onset and the principle frequency of auto-oscillations above the threshold of spin-wave instability were studied at various magnatic fields. We found anomalous field dependence of auto-oscillations frequency in the low field side of the butterfly curve, where the threshold of parallel pumping instability exhibits no anomaly magnons becomes importent in a nonequilibrium system.

Original language	English
Pages (from-to)	409-412
Number of pages	4
Journal	journal of the physical society of japan
Volume	67
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.67.409
Publication status	Published - Feb 1998

Keywords

Auto-oscillations
Nonlinear relaxation
Parametric excitation
Spin waves
YIG

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.67.409

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abstract = "The parallel pumping of spin waves in an yttrium iron garnet (YIG) sphere placed in a microwave cavity has been performed by X-band microwaves. The onset and the principle frequency of auto-oscillations above the threshold of spin-wave instability were studied at various magnatic fields. We found anomalous field dependence of auto-oscillations frequency in the low field side of the butterfly curve, where the threshold of parallel pumping instability exhibits no anomaly magnons becomes importent in a nonequilibrium system.",

keywords = "Auto-oscillations, Nonlinear relaxation, Parametric excitation, Spin waves, YIG",

author = "Michinobu Mino and Hisayuki Urakami and Safonov, {Vladimir L.} and Keiichi Zouta and Hitoshi Yamazaki",

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AU - Mino, Michinobu

AU - Urakami, Hisayuki

AU - Safonov, Vladimir L.

AU - Zouta, Keiichi

AU - Yamazaki, Hitoshi

PY - 1998/2

Y1 - 1998/2

N2 - The parallel pumping of spin waves in an yttrium iron garnet (YIG) sphere placed in a microwave cavity has been performed by X-band microwaves. The onset and the principle frequency of auto-oscillations above the threshold of spin-wave instability were studied at various magnatic fields. We found anomalous field dependence of auto-oscillations frequency in the low field side of the butterfly curve, where the threshold of parallel pumping instability exhibits no anomaly magnons becomes importent in a nonequilibrium system.

AB - The parallel pumping of spin waves in an yttrium iron garnet (YIG) sphere placed in a microwave cavity has been performed by X-band microwaves. The onset and the principle frequency of auto-oscillations above the threshold of spin-wave instability were studied at various magnatic fields. We found anomalous field dependence of auto-oscillations frequency in the low field side of the butterfly curve, where the threshold of parallel pumping instability exhibits no anomaly magnons becomes importent in a nonequilibrium system.

KW - Auto-oscillations

KW - Nonlinear relaxation

KW - Parametric excitation

KW - Spin waves

KW - YIG

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The Onset of Auto-Oscillations of Parametrically Excited Spin-Wave Pairs

Abstract

Keywords

ASJC Scopus subject areas

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