Phase stability and magnetic properties of L21 phase in Co2Mn(Al1-xSix) Heusler alloys

Rie Y. Umetsu, Kosei Kobayashi, Asaya Fujita, Ryosuke Kainuma, Kiyohito Ishida

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

The phase stability and magnetic properties of the L21 phase in Co2Mn(Al1-xSix) Heusler alloys were investigated. The order-disorder phase transition temperature, TtL 21 / B 2, increases linearly with increasing x; TtL 21 / B 2 for Co2MnSi is estimated to be about 1580 K. These results mean that the stability of L21 phase of Co2MnSi is much higher than that of Co2MnAl. Although the saturation magnetic moment increases linearly with increasing x, i.e., consistent with the generalized Slater-Pauling behavior, the Curie temperature increases, exhibiting slightly upward convexity.

Original languageEnglish
Pages (from-to)723-726
Number of pages4
JournalScripta Materialia
Volume58
Issue number9
DOIs
Publication statusPublished - 2008 May

Keywords

  • Half-metal ferromagnets
  • Heusler phases
  • Magnetic properties
  • Microstructure
  • Order-disorder phenomena

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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