Bi–Mn Binary Phase Diagram in High Magnetic Fields

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  • Mitsui Yoshifuru
    High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University
  • Koyama Keiichi
    Graduate School of Science and Engineering, Kagoshima University
  • Watanabe Kazuo
    High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University

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  • Bi–Mn Binary Phase Diagram in High Magnetic Fields

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To examine magnetic field effects on the Bi–Mn equilibrium phase, a high-magnetic fields differential thermal analysis (HF-DTA) was performed for fields up to 18 T and temperatures ranging from 300 to 753 K. For zero field, the peritectic temperatures Tp1 (BiMn1.08 + Bi-rich liquid → BiMn) and Tp2 (αMn + Bi-rich liquid → BiMn1.08), and the eutectic temperature TE (the Bi-rich liquid → Bi solid + BiMn) were determined to be 632, 721 and 538 K, respectively. The Bi–Mn phase diagram at 18 T was obtained, which showed that Tp1 increases with increasing magnetic fields at the rate of 2 K T−1. Furthermore, the liquidus boundary temperature Tliq between BiMn1.08 + liquid and Bi-rich liquid was found to increase nonlinearly with increasing magnetic field.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 54 (2), 242-245, 2013

    The Japan Institute of Metals and Materials

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