NMR study of heavy-fermion and iron-based supeconductors
| Project/Area Number |
24540372
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 超伝導 / 強相関電子系 / 磁気共鳴 / 圧力効果 / 重い電子系超伝導 / 鉄系高温超伝導 / 国際情報交換 |
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| Outline of Final Research Achievements |
In this research project, I obtained impotant NQR experimental results in the field of the heavy-fermion superconductivity. It is generally considered that spin fluctuation induces superconductivity in many heavy-fermion superconductos. However, I suggested that superconductivity is derived from some kind of fluctuations except for spin ones in heavy-fermion compound CeIrIn5. It is probable that the fluctuation related with the occurence of superconductivity in CeIrIn5 is electric rather than magnetic. Next, I added a magnetic interaction to CeIrIn5 by the Cd doping. The addition of a magnetic interaction leads to the increase in Tc, suggesting that the collaboration of two interactions (maybe spin and electric fluctuations) is able to enhance Tc. I belive that this important experimental result contributes to the realization of a room temperature superconductor.
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Report
(4 results)
Research Products
(51 results)
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[Presentation] Heavy-fermion superconductor CeIr(In1-xCdx)5 studied by In-NQR
Author(s)
M. Yashima, N. Tagami, S. Taniguchi, T. Unemori, K. Uematsu, H. Mukuda, Y. Kitaoka, Y. Ota, F. Honda, R. Settai, and Y. Onuki
Organizer
重い電子系の形成と秩序化 第4回研究会
Place of Presentation
東京工業大学
Related Report
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