| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2013: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
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| Outline of Final Research Achievements |
Off-stoichiometric NiMn-based Heusler alloys indicate martensitic transformation from ferromagnetic parent phase to weak-(or non-)magnetic martensite phase under cooing. At the transformation, structural change and magnetic transition occur at the same time. Therefore, drastic change of the magnetization happens and applying a magnetic field induces inverse martensitic transformation. Unique phenomena, that is, giant magnetoresistance, superelasticity, magnetocaloric effect are also observed associated with the martensitic transformation. Such drastic changes of the various physical properties are considered to be due to the change of the electronic states between in the parent phase and in the martensite phase. In the present study, specimens of three kinds of alloy systems were fabricated in wide concentration region, and electronic specific heat coefficient and the Debye temperature were confirmed by low-temperature specific heat measurements.
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