Phase Stabilities and Magnetic Properties of Mn-Deficient and Ge-Substituted Mn3Ga with D022 Structure

Hironari Okada, Toru Sasaki, Yudai Syoji, Rie Y. Umetsu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We have investigated phase stabilities and magnetic properties of the tetragonal D022 phase in Mn-deficient Mn3-xGa and Ge-substituted Mn3Ga1-yGey. A transition from the D022 to L10 phase is observed in the composition range of x=0.5-0.8 in Mn3-xGa. On the other hand, the D022 phase is confirmed in the overall composition of Mn3Ga1-yGey. The thermal stability of the D022 phase strongly depends on the Ge content compared with the Mn deficiency. Magnetization of Mn3-xGa is increased by introducing the Mn deficiency, whereas that of Mn3Ga1-yGey decreases with increasing Ge content despite a constant number of Mn atoms. This result suggests that the magnitude of magnetic moment of Mn atom in Mn3Ga1-yGey is influenced by variations of valence electron and structural properties caused by the Ge substitution.

Original languageEnglish
Article number7904670
JournalIEEE Transactions on Magnetics
Volume53
Issue number11
DOIs
Publication statusPublished - 2017 Nov

Keywords

  • Magnetic anisotropy
  • magnetization
  • manganese alloy
  • phase stability
  • tetragonal structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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