Fundamental Studies on Transition Metal Compounds as Functional Materials by Magnetic Phasa Transition.
| Project/Area Number |
21560684
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical properties of metals
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| Research Institution | Shinshu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NAKASHIMA Miho 信州大学, 理学部, 准教授 (80362614)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 電子 / 磁気物性 / 磁気転移 / 機能材料 / 遷移金属化合物 / 磁化測定 / メスバウアー分光 / 強磁性形状記憶合金 / 磁気冷凍材料 / (Fe,Mn)Rh |
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| Research Abstract |
Magnetic properties for 3d-4d transition metal alloys,(Fe, Mn)(Rh, Pd) system and for Fe(Si, Ge) system were investigated by 57Fe Mossbauer effect measurements and magnetization measurements. A large magnetocaloric effect would be observed for the latter system by electronic structures calculations. For(Fe, Mn)(Rh, Pd) system, we obtained the magnetic phase diagram corresponding to the calculations. For Fe(Si, Ge) system, the obvious change of 57Fe Mossbauer spectra from Kondo insulator to ferromagnetic metal cannot be observed at a critical concentration x_c & sime ; 0.25. The 57Fe hyperfine fields for x=0.6 and 0.7 estimated by fitting of Mossbauer spectra at 80K are 6.0T and 8. 0T, respectively, while they are almost zero for 0≦x≦0. 5.
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Report
(4 results)
Research Products
(19 results)
