Switching of magnon parametric oscillation by magnetic field direction
Abstract
Parametric oscillation occurs when the resonance frequency of an oscillator is periodically modulated. Owing to time-reversal symmetry breaking in magnets, nonreciprocal magnons can be parametrically excited when spatial-inversion symmetry breaking is provided. This means that magnons with opposite propagation directions have different amplitudes. Here we demonstrate switching on and off the magnon parametric oscillation by reversing the external field direction applied to a YFeO micro-structured film. The result originates from the nonreciprocity of surface mode magnons, leading to field-direction dependence of the magnon accumulation under a nonuniform microwave pumping. Our numerical calculation well reproduces the experimental result.
Keywords
Cite
@article{arxiv.2305.12787,
title = {Switching of magnon parametric oscillation by magnetic field direction},
author = {Sohei Horibe and Hiroki Shimizu and Koujiro Hoshi and Takahiko Makiuchi and Tomosato Hioki and Eiji Saitoh},
journal= {arXiv preprint arXiv:2305.12787},
year = {2023}
}
Comments
5 pages, 4 figures