High spin polarization in CoFeMnGe equiatomic quaternary Heusler alloy

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

88 Citations (Scopus)

Abstract

We report the structure, magnetic property, and spin polarization of CoFeMnGe equiatomic quaternary Heusler alloy. The alloy was found to crystallize in the cubic Heusler structure (prototype LiMgPdSn) with considerable amount of DO3 disorder. Thermal analysis result indicated the Curie temperature is about 750K without any other phase transformation up to melting temperature. The magnetization value was close to that predicted by the Slater-Pauling curve. Current spin polarization of P = 0.70 ± 0.01 was deduced using point contact andreev reflection measurements. The temperature dependence of electrical resistivity has been fitted in the temperature range of 5-300K in order to check for the half metallic behavior. Considering the high spin polarization and Curie temperature, this material appears to be promising for spintronic applications.

Original languageEnglish
Article number203902
JournalJournal of Applied Physics
Volume116
Issue number20
DOIs
Publication statusPublished - 2014 Nov 28
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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