| Project/Area Number |
07044045
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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 Graduated School of Sciences, Hokkaido University, Prof, 大学院・理学研究科, 教授 (70029560)
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| Co-Investigator(Kenkyū-buntansha) |
ピスクノフ ワイ ロシア科学アカデミー, ウラル研究所, 研究員
ヤクボフスキー エイ ロシア, クルチャトフ研究所, 主任研究員
ロス ジョゼフ スイス, チューリッヒ大学, 講師
マリ ミハエル スイス, チューリッヒ大学, 講師
ブリンクマン ディー スイス, チューリッヒ大学, 教授
MATSUDA Yuji Graduated School of Sciences, Hokkaido University, AssoPr, 大学院・理学研究科, 助教授 (50199816)
MALI Mija Zurich University, Switzerland, Lecture
ROOS Joseph Zurich University, Switzerland, Lecture
BRINKMANN Detlef Zurich University, Switzerland, Prof.
PISKUNOV Yuri Russian Academy of Sciences, Russia, Researcher
YAKUBOVSKII Andrey Kurchatov Institute, Russia, Chief Researcher
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| Project Period (FY) |
1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1995: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | NMR / High-T_c Superconductor / Strongly correlated electorons / Metal-Insulator Transition / Magnetizm |
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| Research Abstract |
In this project, unusual electronic properties of the strongly correlated systems such as quaternary compound YNi_2B_2C and RPt_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 compounds (i.e. CuIr_2S_4 etc.)with enriched isotope of ^<33>S,spin ladder(VO)_2P_2O_7, NdBa_2Cu_3O_7and 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 states at the Metal-Insulator transition have been discussed.
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