High spin polarization in a two phase quaternary Heusler alloy Co2 Mn Al1-X SnX

A. Rajanikanth*, D. Kande, Y. K. Takahashi, K. Hono

*この研究の対応する著者

研究成果: Article査読

18 被引用数 (Scopus)

抄録

We have investigated the structure and the spin polarization of Co2 MnAl, Co2 MnSn, and Co2 Mn Al0.5 Sn0.5 alloys. The structures of the Co2 MnAl and Co2 MnSn alloys that were annealed for four days at 450 °C were B2 and L 21, respectively. Co2 Mn Al0.5 Sn0.5 had a dendrite microstructure that was formed by the phase separation into Al-enriched B2 and Sn-enriched L 21 phases during solidification. The saturation magnetization values of Co2 MnAl, Co2 Mn Al0.5 Sn0.5, and Co2 MnSn were 3.66 μB, 4.3 μB, and 4.9 μB, respectively, which are slightly lower than the theoretical values of 4 μB, 4.5 μB, and 5 μB due to the low degree of L 21 ordering. The spin polarization P measured by the point contact Andreev reflection technique were 0.56 for B2- Co2 MnAl, 0.6 for L 21 - Co2 MnSn, and interestingly, a higher value of 0.63 for the two phase Co2 Mn Al0.5 Sn0.5 alloy.

本文言語English
論文番号09J508
ジャーナルJournal of Applied Physics
101
9
DOI
出版ステータスPublished - 2007
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

フィンガープリント

「High spin polarization in a two phase quaternary Heusler alloy Co2 Mn Al1-X SnX」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル