Experimental inspection of a computationally-designed NiCrMnSi Heusler alloy with high Curie temperature

Y. Onodera, K. Elphick, T. Kanemura, T. Roy, T. Tsuchiya, Masahito Tsujikawa, K. Yoshida, Y. Nagai, S. Mizukami, A. Hirohata, Masafumi Shirai

Research output: Contribution to journalArticle

Abstract

Nowadays advanced magnetic tunnel junction applications demand very high tunnel magnetoresistance at room temperature, thus it is quite important to explore high Curie temperature T c half-metallic Heusler alloys. In this article first-principles calculation unveiled that NiCrMnSi has a T c of 1200 K comparable to that of traditional Co2MnSi Heusler alloys, even though it does not contain a Co element. In addition, we examined whether NiCrMnSi Heusler phase films can be obtained by magnetron sputtering on MgO substrates. The results of the structural analysis and first-principles calculations indicated that the NiCrMnSi Heusler phase is metastable. A possible route to obtain a metastable NiCrMnSi Heusler alloy is to utilize appropriate templates.

Original languageEnglish
Article number073003
JournalJapanese journal of applied physics
Volume59
Issue number7
DOIs
Publication statusPublished - 2020 Jul 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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