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; Kyoung Jin Lee; Teruo Ono

doi:10.7567/1882-0786/ab33d5

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
, Kyoung Jin Lee
, Teruo Ono

^*Corresponding author for this work

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

25 Citations (Scopus)

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 language	English
Article number	093001
Journal	Applied Physics Express
Volume	12
Issue number	9
DOIs	https://doi.org/10.7567/1882-0786/ab33d5
Publication status	Published - 2019 Sept 1

Bibliographical note

Publisher Copyright:
© 2019 The Japan Society of Applied Physics.

ASJC Scopus subject areas

General Engineering
General Physics and Astronomy

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Cite this

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title = "Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys",

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.",

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doi = "10.7567/1882-0786/ab33d5",

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T1 - Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys

AU - Okuno, Takaya

AU - Kim, Se Kwon

AU - Moriyama, Takahiro

AU - Kim, Duck Ho

AU - Mizuno, Hayato

AU - Ikebuchi, Tetsuya

AU - Hirata, Yuushou

AU - Yoshikawa, Hiroki

AU - Tsukamoto, Arata

AU - Kim, Kab Jin

AU - Shiota, Yoichi

AU - Lee, Kyoung Jin

AU - Ono, Teruo

PY - 2019/9/1

Y1 - 2019/9/1

N2 - 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.

AB - 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.

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DO - 10.7567/1882-0786/ab33d5

M3 - Article

AN - SCOPUS:85072845946

SN - 1882-0778

VL - 12

JO - Applied Physics Express

JF - Applied Physics Express

IS - 9

M1 - 093001

ER -

Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys

Abstract

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