In-situ Observation and Differential Thermal Analysis of MnBi in High Magnetic Fields

Daiki Miyazaki, Yoshifuru Mitsui, Ken Ichi Abematsu, Kohki Takahashi, Kazuo Watanabe, Satoshi Uda, Keiichi Koyama

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2 Citations (Scopus)


For investigating in-field process of melting and solidification visually and quantitatively, in-situ observation system with differential thermal analysis (DTA) utilized in high temperature and in high magnetic field was developed. Decomposition processes of the bulk sample of ferromagnetic MnBi were directly observed with collecting DTA data under high magnetic field of 10 T for the 290-770 K temperature range. When the temperature was over decomposition point (ferromagnetic MnBi → paramagnetic Mn1.08Bi + liquid), liquid phase appeared on the sample surface. Furthermore, when the temperature was over peritectic temperature (∼ 700 K: paramagnetic Mn1.08Bi → Mn + liquid), the sample surface was broken and a large quantity of the liquid phase appeared from the sample. The in-situ observation also suggested that the decomposition temperature increased from 620 K for a zero field to 638 K for a magnetic field of 10 T.

Original languageEnglish
Pages (from-to)1324-1331
Number of pages8
JournalPhysics Procedia
Publication statusPublished - 2015
Event20th International Conference on Magnetism, ICM 2015 - Barcelona, Spain
Duration: 2015 Jul 52015 Jul 10


  • MnBi
  • differential thermal analysis
  • high magnetic field
  • in-situ observation


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