Magnetic-field-induced acceleration of phase formation in τ-Mn-Al

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

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The phase formation of ferromagnetic L10-MnAl (τ-phase) was accelerated by annealing in magnetic field. With in-field annealing at 623 K, the magnetization of the τ-phase annealed at 15 T was a maximum of 72.2 A・m2/kg at 1.5 T, which is over 4 times larger than that annealed without an external magnetic field for the same annealing time. On the other hand, the transformation from τ-phase to β-phase was suppressed under magnetic field. The obtained bulk sample did not show magnetic anisotropy because of the ε-τ solid-state transformation. Obtained results suggested that magnetic field induced acceleration of transformation was due to the gain of Zeeman energy which increases the driving force of the ε-τ transformation.

Original languageEnglish
Pages (from-to)1511-1518
Number of pages8
JournalMaterials Transactions
Volume58
Issue number11
DOIs
Publication statusPublished - 2017

Keywords

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

ASJC Scopus subject areas

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

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