論文

査読有り
2019年9月1日

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

Journal of Magnetism and Magnetic Materials
  • P. Phu
  • ,
  • K. Yamanoi
  • ,
  • K. Ohnishi
  • ,
  • J. Hyodo
  • ,
  • K. Rogdakis
  • ,
  • Y. Yamazaki
  • ,
  • T. Kimura
  • ,
  • H. Kurebayashi

485
開始ページ
304
終了ページ
307
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.jmmm.2019.04.070

© 2019 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.

リンク情報
DOI
https://doi.org/10.1016/j.jmmm.2019.04.070
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85065476311&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85065476311&origin=inward

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