Change of the equilibrium state of ferromagnetic MnBi by high magnetic fields

Keiichi Koyama, Yoshifuru Mitsui, Eun Sang Choi, Yuki Ikehara, Eric C. Palm, Kazuo Watanabe

Research output: Contribution to journalLetterpeer-review

36 Citations (Scopus)

Abstract

Differential thermal analysis was carried out for ferromagnetic material MnBi in the temperature range 300-773 K in magnetic fields up to 45 T to investigate the effect of high magnetic fields on its decomposition process and corresponding phase diagram. The decomposition temperature Tt (MnBi → Mn1.08Bi + liquid Bi) increases from 632 K (at a zero field) to 714 K by applying a magnetic field of 45 T. Furthermore, the magnetocaloric effect of MnBi is observed in 11.5-45 T in the vicinity of 689 K, showing that a field-induced composition process occurs. The obtained results show that the equilibrium state of MnBi can be controlled by a high magnetic field.

Original languageEnglish
Pages (from-to)L78-L80
JournalJournal of Alloys and Compounds
Volume509
Issue number5
DOIs
Publication statusPublished - 2011 Feb 3

Keywords

  • Differential thermal analysis
  • High magnetic fields
  • Magnetocaloric effect
  • MnBi
  • Phase transition

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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