The effect of iron addition on the spin polarization and magnetic properties of Co2CrGa Heusler alloy

T. M. Nakatani, Z. Gercsi, A. Rajanikanth, Y. K. Takahashi, K. Hono

研究成果: Article査読

16 被引用数 (Scopus)

抄録

We report the effect of the substitution of Co with Fe in Co 2-xFexCrGa Heusler alloys (x = 0-0.3) on their magnetic property, electronic band structure and spin polarization, both experimentally and theoretically. The intrinsic spin polarization of Co2CrGa measured by the point-contact Andreev reflection method was P = 0.61 0.02, whereas a small substitution with Fe for Co of x = 0.1 enhanced the spin polarization to P = 0.67 0.03 regardless of a weak L21 order. Ab initio calculations for both the perfectly L21 ordered and partially disordered structures showed that the small amount of Fe induced a robustness of the spin polarization against the structural disorder. These results demonstrate the effect of the Fe addition in Co2CrGa is to improve the spin polarization even with the presence of chemical disorder.

本文言語English
論文番号225002
ジャーナルJournal of Physics D: Applied Physics
41
22
DOI
出版ステータスPublished - 2008 11 21
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 音響学および超音波学
  • 表面、皮膜および薄膜

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