| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
The pressure-temperature phase diagram of alpha-Mn is established. The weak ferromagnetic (WFM) phase is discovered under high pressure, where a huge anomalous Hall effect (AHE) is observed. The AHE emerging due to the change of the ordered state is the first case, indicating that the origin is the Berry curvature in the ordered state with irreducible representation same as the ferromagnet. At the critical pressure where the WFM phase disappears, the electrical resistance shows T^5/3 dependence in the wide temperature range, indicating the existence of the ferromagnetic fluctuation. The superconductivity has not been observed in the pressure range up to 17 GPa. The ferromagnetic fluctuation in the noncentrosymmetric metal causes the lack of the band degeneracy which is required in the formation of Cooper pairs.
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