Magnetic-field-induced enhancement of phase transformation in ferromagnetic τ-Mn-Al

Ryota Kobayashi, Yoshifuru Mitsui, Rie Y. Umetsu, Kohki Takahashi, Masaki Mizuguchi, Keiichi Koyama

Research output: Contribution to journalArticlepeer-review

Abstract

The magnetic field effect on phase formations of ferromagnetic Mn-Al(τ-phase)was evaluated. The transformation from ε-phase with hcp-structure to τ-phase was accelerated by annealing in magnetic field. With in-field annealing at 623 K, the magnetization of the sample annealed at 15 T was a maximum of 72.2 A・m2/kg at 1.5 T, which was over 4 times larger than that annealed in a zero field. Meanwhile, the precipitation of non-ferromagnetic β-phase was suppressed by in-field annealing. Magnetic field-induced acceleration of ε-τ transformation and suppression of τ-β transformation were due to the gain of Zeeman energy of τ-phase.

Original languageEnglish
Pages (from-to)181-185
Number of pages5
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume83
Issue number6
DOIs
Publication statusPublished - 2019
Externally publishedYes

Keywords

  • Ferromagnetic material
  • High magnetic fields
  • Manganese-aluminum
  • Phase formation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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