Estimation of the spin polarization for Heusler-compound thin films by means of nonlocal spin-valve measurements: Comparison of Co 2FeSi and Fe 3Si

K. Hamaya, N. Hashimoto, S. Oki, S. Yamada, M. Miyao, T. Kimura

研究成果: ジャーナルへの寄稿学術誌査読

71 被引用数 (Scopus)

抄録

We study room-temperature generation and detection of pure spin currents using lateral spin-valve devices with electrodes formed from the Heusler compounds Co 2FeSi (CFS) or Fe 3Si (FS). The magnitude of the nonlocal spin-valve signals is strongly affected by resistivity variations observed particularly in low-temperature-grown Heusler compounds containing ordered structures. From an analysis based on a one-dimensional spin diffusion model, we find that the spin polarization monotonically increases with decreasing resistivity, which depends on the structural ordering, for both the CFS and FS electrodes, and show that CFS has a larger spin polarization than FS.

本文言語英語
論文番号100404
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
85
10
DOI
出版ステータス出版済み - 3月 13 2012

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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