Investigation of the quaternary Fe2 - XCoxMnSi (0 ≤ x ≤ 0.6) alloys by structural, magnetic, resistivity and spin polarization measurements

Lakhan Bainsla, M. Manivel Raja, A. K. Nigam, B. S.D.Ch S. Varaprasad, Y. K. Takahashi, K. G. Suresh, K. Hono

研究成果: Article査読

18 被引用数 (Scopus)

抄録

A detailed study of the Fe2 - xCoxMnSi (0 ≤ x ≤ 0.6) alloys has been carried out by investigating the samples by x-ray diffraction, Mössbauer spectroscopy, magnetization, transport and current spin polarization measurements. A perfectly ordered L21 phase is found to exist for x = 0.4. Competing magnetic interactions between ferromagnetic and antiferromagnetic (AFM) phases are seen in the alloys with x < 0.2, whereas the AFM phase is completely absent for x ≥ 0.2 as revealed by the magnetization and resistivity data. The Curie temperature and saturation magnetization values increase with increase in the Co concentration. Anomalous, non metallic-like behaviour is observed for x = 0.4. Current spin polarization values of 0.61 ± 0.01 and 0.66 ± 0.01 were deduced for x = 0.2 and x = 0.4 respectively, using the point contact Andreev reflection spectroscopy . Considering the high spin polarization and Curie temperature, materials with x ≥ 0.2 appear to be very promising for spintronic devices.

本文言語English
論文番号125002
ジャーナルJournal of Physics D: Applied Physics
48
12
DOI
出版ステータスPublished - 2015 4月 1
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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