In-situ observation and differential thermal analysis of MnBi in high magnetic fields

被引：1
|
作者：
Miyazaki, Daiki [1 ]
Mitsui, Yoshifuru [1 ]
Abematsu, Ken-ichi [1 ]
Takahashi, Kohki [2 ]
Watanabe, Kazuo [2 ]
Uda, Satoshi [2 ]
Koyama, Keiichi [1 ]
机构：
[1] Kagoshima Univ, Grad Sch Sci & Engn, Kagoshima 8900065, Japan
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
20TH INTERNATIONAL CONFERENCE ON MAGNETISM, ICM 2015 | 2015年 / 75卷
关键词：
in-situ observation; differential thermal analysis; high magnetic field; MnBi; BINARY PHASE-DIAGRAM; FE-B MAGNETS; ALLOYS; TRANSFORMATION; COERCIVITY; GROWTH;
D O I：
10.1016/j.phpro.2015.12.148
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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 (similar to 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.
引用
收藏
页码：1324 / 1331
页数：8
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