Study for magnetic field effects on phase formation of Mn-based magnetic materials, and the optimization of the synthesis under magnetic fields
| Project/Area Number |
26820281
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Physical properties of metals/Metal-base materials
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| Research Institution | Kagoshima University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 強磁性 / 強磁場 / マンガン / 反応 / 相変態 / マンガン系強磁性体 / 焼結 / 磁場中熱処理 / 反応焼結 / ハード磁性材料 |
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| Outline of Final Research Achievements |
Magnetic field effects on the reaction and the phase formation of Mn-based ferromagnets were investigated. In this study, the reactive sintering of MnBi, and phase formation of ferromagnetic phase of Mn-Al alloys were focused on. Reactive sintering of MnBi was enhanced by magnetic fields. It was found that magnetic field enhanced the number of formed MnBi phase around Mn grain at the initial stage of the reaction. Furthermore, almost complete uniaxial oriented MnBi bulk samples were obtained by both solid-phase and liquid-phase sintering under high magnetic field.
Phase formation of ferromagnetic Mn-Al alloys was also enhanced by in-field annealing. The field-induced enhancement of the phase formation of ferromagnetic Mn-Al phase was largest for the annealing at 623 K, which was just below Curie temperature of ferromagnetic phase.
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Report
(4 results)
Research Products
(18 results)
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[Presentation] In-magnetic-field annealing for Mn-based alloys2016
Author(s)
Yoshifuru Mitsui, Ryota Kobayashi, Rie Y. Umetsu, Kohki Takahashi, Masaki Mizuguchi, Keiichi Koyama
Organizer
International conference of the Asian Union of Magnetics Society
Place of Presentation
Tainan(Taiwan)
Year and Date
2016-08-01
Related Report
Int'l Joint Research
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[Presentation] Magnetic-field-induced reaction in Bi-Mn alloys2015
Author(s)
Yoshifuru Mitsui, Atsushi Taira, Daiki Miyazaki, Akio Takaki, Rie Y. Umetsu, Kohki Takahashi Keiichi Koyama
Organizer
2nd international symposium on frontiers in materials science
Place of Presentation
早稲田大学西早稲田キャンパス(東京都新宿区)
Year and Date
2015-11-19
Related Report
Int'l Joint Research
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