Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys

Takaya Okuno, Se Kwon Kim, Takahiro Moriyama, Duck Ho Kim, Hayato Mizuno, Tetsuya Ikebuchi, Yuushou Hirata, Hiroki Yoshikawa, Arata Tsukamoto, Kab Jin Kim, Yoichi Shiota, Kyung Jin Lee, Teruo Ono

Research output: Contribution to journalArticle

Abstract

We provide a macroscopic theory and experimental results for magnetic resonances of antiferromagnetically-coupled ferrimagnets. Our theory, which interpolates the dynamics of antiferromagnets and ferromagnets smoothly, can describe ferrimagnetic resonances across the angular momentum compensation point. We also present experimental results for spin-torque induced ferrimagnetic resonance at several temperatures. The spectral analysis based on our theory reveals that the Gilbert damping parameter, which has been considered to be strongly temperature dependent, is insensitive to temperature. We envision that our work will facilitate further investigation of ferrimagnetic dynamics by providing a theoretical framework suitable for a broad range of temperatures.

Original languageEnglish
Article number093001
JournalApplied Physics Express
Volume12
Issue number9
DOIs
Publication statusPublished - 2019 Jan 1

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Magnetic resonance
magnetic resonance
Ferrimagnetic resonance
temperature dependence
ferrimagnets
Temperature
temperature
Angular momentum
Spectrum analysis
spectrum analysis
torque
Torque
angular momentum
Damping
damping

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Okuno, T., Kim, S. K., Moriyama, T., Kim, D. H., Mizuno, H., Ikebuchi, T., ... Ono, T. (2019). Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys. Applied Physics Express, 12(9), [093001]. https://doi.org/10.7567/1882-0786/ab33d5

Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys. / Okuno, Takaya; Kim, Se Kwon; Moriyama, Takahiro; Kim, Duck Ho; Mizuno, Hayato; Ikebuchi, Tetsuya; Hirata, Yuushou; Yoshikawa, Hiroki; Tsukamoto, Arata; Kim, Kab Jin; Shiota, Yoichi; Lee, Kyung Jin; Ono, Teruo.

In: Applied Physics Express, Vol. 12, No. 9, 093001, 01.01.2019.

Research output: Contribution to journalArticle

Okuno, T, Kim, SK, Moriyama, T, Kim, DH, Mizuno, H, Ikebuchi, T, Hirata, Y, Yoshikawa, H, Tsukamoto, A, Kim, KJ, Shiota, Y, Lee, KJ & Ono, T 2019, 'Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys', Applied Physics Express, vol. 12, no. 9, 093001. https://doi.org/10.7567/1882-0786/ab33d5
Okuno T, Kim SK, Moriyama T, Kim DH, Mizuno H, Ikebuchi T et al. Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys. Applied Physics Express. 2019 Jan 1;12(9). 093001. https://doi.org/10.7567/1882-0786/ab33d5
Okuno, Takaya ; Kim, Se Kwon ; Moriyama, Takahiro ; Kim, Duck Ho ; Mizuno, Hayato ; Ikebuchi, Tetsuya ; Hirata, Yuushou ; Yoshikawa, Hiroki ; Tsukamoto, Arata ; Kim, Kab Jin ; Shiota, Yoichi ; Lee, Kyung Jin ; Ono, Teruo. / Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys. In: Applied Physics Express. 2019 ; Vol. 12, No. 9.
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