2010 Fiscal Year Final Research Report
NMR study on competitive order in high-temperature superconductor by using clean single crystal
| Project/Area Number |
20540360
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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 |
Condensed matter physics II
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| Research Institution | Kyoto University |
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Principal Investigator |
NISHIYAMA Masahide Kyoto University, 大学院・人間環境学研究科, 研究員(科学研究) (30448758)
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| Co-Investigator(Renkei-kenkyūsha) |
ISHIDA Takekazu 大阪府立大学, 大学院・工学研究科, 教授 (00159732)
NOGUTI Satoru 大阪府立大学, 大学院・工学研究科, 准教授 (70180718)
KAWAMATA Shuichi 大阪府立大学, 大学院・工学研究科, 准教授 (50211868)
KATOU Masaru 大阪府立大学, 大学院・工学研究科, 准教授 (90204495)
MACHI Takato 超電導工学研究所, 部長補佐 (80415934)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 高温超伝導 / 隠れた秩序 / 磁束格子 / スーパークリーン |
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| Research Abstract |
The main purpose of this study is to reveal the detail of the properties, such as the competitive order and co-existence with hidden order parameters in the superconductor state by using NMR method of the super clean system YBa_2Cu_4O_8, socalled Y-1248, single crystal.
I have mainly analyzed the experimental results and constructed the environment of the equipment of the NMR experiments. I succeed the improvement of the signal/noise ratio and the sensitivity of signal for a minute size sample through the NMR measurement of single crystal of Rb_2Cu_3SnF_<12>, and Cr-jarosite which are minute size samples and the Cu_2OCl_2 powder samples, which generate very small Cl-NMR signal. The measurements of the angle dependence NMR of single crystal, even a very minute sample, are established.
It is possible that this system is applied to NMR measurements of the super-clean system Y-1248 single crystal and detailed information of the super-clean system Y-1248 single crystal such as the competitive order and co-existence with hidden order parameters in the superconductor state.
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