NMR Study on Metal-Insulator Transition and High-Tc Superconductivity
| Project/Area Number |
06044003
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Joint Research |
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| Research Institution | Hokkaido University |
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Principal Investigator |
KUMAGAI Ken-ichi Faculty of Science, Hokkaido University, Professer, 理学部, 教授 (70029560)
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| Co-Investigator(Kenkyū-buntansha) |
ヤクボフスキー A ロシア, クルカトフ研究所, 主任研究員
ロス J スイス, チューリッヒ大学, 講師
マリ M スイス, チューリッヒ大学, 講師
ブリンクマン D スイス, チューリッヒ大学, 教授
FUJIWARA Kenji Faculty of Science, Shimane University, Associate Professer, 理学部, 助教授 (50238630)
MATSUDA Yuji Faculty of Science, Hokkaido University, Associate Professer, 理学部, 助教授 (50199816)
BRINKMANN Detlef Zurich University, Switzerland, Professer
MALI Mija Zurich University, Switzerland, Lecturer
YAKUBOVSKII Andrey Kuruchatov Institute, Russia, Chief Resercher
ROOS Joseph Zurich University, Switzerland, Lecturer
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| Project Period (FY) |
1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1994: ¥3,100,000 (Direct Cost: ¥3,100,000)
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| Keywords | NMR / Superconductivity / Metal-insulator transition / Strongly-correlated system / Magnetism |
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| Research Abstract |
In this project unusual electronic properties of the strongly correlated systems such as quatemary compound YNi_2B_2C have been investigated by NMR measurements. The enhancements of T_1T and Knight shift of ^<11>B at low temperature show an importance of the effects of 3d spin fluctuations in the superconducting YNi_2B_2C families.
We have also prepared some Cu Spinel compound (i.e.CuIr_2S_4 etc.) with enriched isotope of ^<33>S and also NdBa_2Cu_3O_7 and BaPb_<1-X>Bi_XO_3 with ^<137>Ba. With using of these isotopes, we have successfully observed NMR signals at the atomic sites, which have been investigated at the first time. Magnetic and local electronic state at the Metal-Insulator transition in the Cu Spinel has been discussed.
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Report
(1 results)
Research Products
(8 results)
