| Project/Area Number |
03640301
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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 |
固体物性
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| Research Institution | UNIVERSITY OF TOKYO |
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Principal Investigator |
MORI Nobuo UNIVERSITY OF TOKYO, INSTITUTE FOR SOLID STATE PHYSICS, PROFESSOR, 物性研究所, 教授 (40000848)
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| Co-Investigator(Kenkyū-buntansha) |
OGURO Isamu UNIVERSITY OF TOKYO, INSTITUTE FOR SOLID STATE PHYSICS, RESEARCH ASSOCIATE, 物性研究所, 助手 (80169268)
MURAYAMA Chizuko UNIVERSITY OF TOKYO, INSTITUTE FOR SOLID STATE PHYSICS, TECHNICAL ASSOCIATE, 物性研究所, 教務職員 (80174316)
TAKAHASHI Hiroki UNIVERSITY OF TOKYO, INSTITUTE FOR SOLID STATE PHYSICS, RESEARCH ASSOCIATE, 物性研究所, 助手 (80188044)
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| Project Period (FY) |
1991 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1992: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1991: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Cerium-pnictide / High pressure and low temperature / Heavy fermion / Kondo effect / Crystalline field / Low carrier / Phase diagram / Phase transition / セリウム・プニクタイト / 低温・超高圧 / 高密度近藤 / ヘビ-フェルミオン / 高圧効果 |
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| Research Abstract |
THE PURPOSE OF THIS PROJECT IS TO MAKE CLEAR THE ELECTRICAL AND MAGNETIC PROPERTIES OF CERIUM-PNICTIDES HAVING NACL-TYPE CRYSTAL STRUCTURE UNDER HIGH PRESSURE. RESULTS OBTAINED FOR THESE TWO YEARS ARE AS FOLLOWS.
1. THE ELECTRICAL RESISTIVITY OF THESE COMPOUNDS WERE MEASURED UNDER PRESSURE UP TO 8GPa AND AT TEMPERATURE FROM 4.2K TO 300K.
2. MAGNETIC SUSCEPTIBILITY WAS MEASURED FOR CeP UNDER PRESSURE UP TO 1GPa.
3. HEAT CAPACITY WAS MEASURED FOR CeP UNDER PRESSURE UP TO 0.5GPa.
4. PRESSURE-TEMPERATURE MAGNETIC PHASE DIAGRAM WAS OBTAINED FOR CeBi AND CeSb. FOR CeP MAGNETIC AND ELECTRONIC PHASE DIAGRAM WAS PROPOSED.
5. ELECTRICAL RESISTIVITY UNDER MAGNETIC FIELD WAS MEASURED FOR CeAs AND CeSb.
6. THE SHUBNIKOV DE HAAS SIGNALS OF LaSb AND CeAs WERE OBSERVED.
7. ANOMALOUS ENHANCEMENT OF THE RESISTIVITY OF CeSb WAS INDUCED UNDER PRESSURE NEAR 30K.
8. EFFECTS OF PRESSURE ON THE MAGNETIC STRUCTURE AND THE CRYSTALLINE FIELD SPLITTING OF CeP AND CeAs ARE NOW MEASURED.
THESE RESULTS WERE REPORTED AT CONFERENCES OF THE PHYSICAL SOCIETY OF JAPAN, THE JAPAN SOCIETY OF HIGH PRESSURE SCIENCE AND TECHNOLOGY, AND INTERNATIONAL CONFERENCE OF STRONGLY CORRELATED ELECTRON SYSTEMS HELD AT SENDAI, AND 5TH INTERNATIONAL CONFERENCE OF HIGH PRESSURE IN SEMICONDUCTOR PHYSICS HELD AT KYOTO. THESE RESULTS WILL BE ALSO REPORTED AS AN INVITED PAPER AT AIRAPT CONFERENCE ON HIGH PRESSURE SCIENCE AND TECHNOLOGY AT COLORADO.
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