| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
For studying in-field process of melting and solidification visually and quantitatively, in-situ observation system with differential thermal analysis (DTA) utilized in high temperature and high magnetic field was developed. Decomposition processes of the bulk sample of ferromagnetic MnBi were directly observed with collecting DTA data under a high field of 10 T for 290-770 K. When the temperature was over decomposition point (MnBi -> paramagnetic Mn1.08Bi + liquid), liquid phase appeared on the sample surface. When the temperature was over peritectic temperature (~ 700 K: Mn1.08Bi -> Mn + liquid), the sample surface was broken and a large quantity of the liquid phase appeared from the sample. The decomposition temperature increased from 620 K for a zero field to 638 K for a magnetic field of 10 T. A magnetic field effect on the suprcooling state of Mn + liquid -> Mn1.08Bi and MnBi was observed. MnBi bulk magnets were synthesized by heat treatment under a high field.
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