| Project/Area Number |
62540265
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
物性一般（含極低温･固体物性に対する理論）
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| Research Institution | Himeji Institute of Technology (1988)
Kobe University (1987) |
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Principal Investigator |
KOHARA Takao Basic Research Lab., Himeji Institute of Tech., 工業基礎研究所, 教授 (70107986)
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| Project Period (FY) |
1987 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1988: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1987: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Heavy Fermion / Anisotropic energy gap / NMR / 超伝導ウラニウム化合物 / 異方的エネルギーギャップ |
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| Research Abstract |
We prepared two kinds of heavy-fermin superconductors, URu_2Si_2 and UPt_3 and measured NMR of these samples. The mechanism of superc on Rductivity in f-election system is still unsolved an have many parts of unknown regeon. So some NMR data (Knisht shift and nuclecn spin-lattia relaxatin time) could be offered as important results. Our results suggest that the pair-state of these superconductors is either sinqlet with spin-orbit scatlering by impurities or/both triplet with gap-zero on a line at the Fermi surface. To clariby on mechanism of superconductivity more precisely, there is a serious problem that the saturatin-phenomena of nuclear spin-lattice relaxatin time were observed below 0.3K due to the impurity in the sample. We have to get the starting materials of high purity in future.
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