Generation of multipeak spectrum of spin torque oscillator in non-linear regime

Shuichi Iwakiri*, Satoshi Sugimoto, Yasuhiro Niimi, Kensuke Kobayashi, Yusuke Kozuka, Yukiko K. Takahashi, Shinya Kasai

*この研究の対応する著者

研究成果: Article査読

抄録

We investigate the spectral characteristics of a spin torque oscillator (STO) excited by the spin Hall-induced spin current. We observe that the modest spin current injection triggers the conventional single peak oscillating behavior of the STO. As the spin current is further increased to enter the non-linear regime, we find the transition of the spectrum from a single peak to a multipeak structure whose frequency spacing is constant. This behavior can be primarily explained by the extremely broadened peak of the STO, which is accompanied by the frequency-dependent filtering by the transmission line. To explain the observation more quantitatively, we also discuss that the multipeak may reflect the characteristics of the intrinsic dynamics of the STO in the non-linear regime.

本文言語English
論文番号022406
ジャーナルApplied Physics Letters
117
2
DOI
出版ステータスPublished - 2020 7 13
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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