Effect of Co substitution for Mn on spin polarization and magnetic properties of ferrimagnetic Mn2VAl

B. Deka, A. Srinivasan*, R. K. Singh, B. S.D.Ch S. Varaprasad, Y. K. Takahashi, K. Hono

*この研究の対応する著者

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Bulk (Mn1-xCox)2VAl (x = 0, 0.25, 0.50) alloys in highly ordered L21 structure with a very small amount of B2 disorder have been prepared and their magnetic properties have been measured. The value of saturation magnetizations of the alloys with x = 0, 0.25 and 0.50 are 1.88 μB, 0.84 μB and 0.07 μB, respectively, being consistent with 2.00 μB, 1.00 μB and 0 μB, respectively, predicted by the Slater-Pauling rule. This indicates that the stoichiometric MnCoVAl alloy is a fully compensated ferrimagnet (FCF). Spin polarization measurements using point contact Andreev reflection technique showed that the quaternary alloys exhibited higher intrinsic spin polarization than the parent ternary composition. The spin polarization of 0.60 deduced for the MnCoVAl alloy suggests that spin-polarized current can be extracted from FCF. Curie temperature (TC) and the effective anisotropy constant of (Mn1-xCox)2VAl alloys decrease with increase in Co content.

本文言語English
ページ(範囲)510-515
ページ数6
ジャーナルJournal of Alloys and Compounds
662
DOI
出版ステータスPublished - 2016 3 25
外部発表はい

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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