Bolometric ferromagnetic resonance techniques for characterising spin-Hall effect at high temperatures

P. Phu, K. Yamanoi, Kohei Ohnishi, J. Hyodo, K. Rogdakis, Yoshihiro Yamazaki, Takashi Kimura, H. Kurebayashi

研究成果: ジャーナルへの寄稿記事

抄録

We report on current-induced ferromagnetic resonance techniques to characterise spin-Hall effect at high temperatures. A microwave current was injected into a patterned CoFeB/Pt bi-layer grown on a glass substrate, simultaneously exerting spin-transfer torques through the spin-Hall effect and also causing Joule heating enabling the control of the device temperature. We measured the device temperature by using the device itself as a local temperature sensor. A clear reduction of CoFeB magnetisation was observed as the device temperature was increased allowing us to estimate the Curie temperature of our CoFeB film to be 920 K. The spin-Hall angle of Pt was quantified as (1.72 ± 0.03) × 10−2 at 300 K and was slightly increased to (1.75 ± 0.02) × 10−2 at 410 K. This simple method can be widely used for quantifying the spin-Hall angle of a large variety of materials at high temperatures.

元の言語英語
ページ(範囲)304-307
ページ数4
ジャーナルJournal of Magnetism and Magnetic Materials
485
DOI
出版物ステータス出版済み - 9 1 2019

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Spin Hall effect
Ferromagnetic resonance
ferromagnetic resonance
Hall effect
Temperature
Joule heating
Induced currents
temperature sensors
Temperature sensors
Curie temperature
temperature
torque
Magnetization
Torque
Microwaves
microwaves
Glass
magnetization
glass
Substrates

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

これを引用

Bolometric ferromagnetic resonance techniques for characterising spin-Hall effect at high temperatures. / Phu, P.; Yamanoi, K.; Ohnishi, Kohei; Hyodo, J.; Rogdakis, K.; Yamazaki, Yoshihiro; Kimura, Takashi; Kurebayashi, H.

:: Journal of Magnetism and Magnetic Materials, 巻 485, 01.09.2019, p. 304-307.

研究成果: ジャーナルへの寄稿記事

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abstract = "We report on current-induced ferromagnetic resonance techniques to characterise spin-Hall effect at high temperatures. A microwave current was injected into a patterned CoFeB/Pt bi-layer grown on a glass substrate, simultaneously exerting spin-transfer torques through the spin-Hall effect and also causing Joule heating enabling the control of the device temperature. We measured the device temperature by using the device itself as a local temperature sensor. A clear reduction of CoFeB magnetisation was observed as the device temperature was increased allowing us to estimate the Curie temperature of our CoFeB film to be 920 K. The spin-Hall angle of Pt was quantified as (1.72 ± 0.03) × 10−2 at 300 K and was slightly increased to (1.75 ± 0.02) × 10−2 at 410 K. This simple method can be widely used for quantifying the spin-Hall angle of a large variety of materials at high temperatures.",
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AU - Phu, P.

AU - Yamanoi, K.

AU - Ohnishi, Kohei

AU - Hyodo, J.

AU - Rogdakis, K.

AU - Yamazaki, Yoshihiro

AU - Kimura, Takashi

AU - Kurebayashi, H.

PY - 2019/9/1

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N2 - We report on current-induced ferromagnetic resonance techniques to characterise spin-Hall effect at high temperatures. A microwave current was injected into a patterned CoFeB/Pt bi-layer grown on a glass substrate, simultaneously exerting spin-transfer torques through the spin-Hall effect and also causing Joule heating enabling the control of the device temperature. We measured the device temperature by using the device itself as a local temperature sensor. A clear reduction of CoFeB magnetisation was observed as the device temperature was increased allowing us to estimate the Curie temperature of our CoFeB film to be 920 K. The spin-Hall angle of Pt was quantified as (1.72 ± 0.03) × 10−2 at 300 K and was slightly increased to (1.75 ± 0.02) × 10−2 at 410 K. This simple method can be widely used for quantifying the spin-Hall angle of a large variety of materials at high temperatures.

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