2003 Fiscal Year Final Research Report Summary
RESEARCH ON HIGH T_C ORGANIC MAGNETS AND NON-FERMI LIQUID BEHAVIOR UNDER MULTIPLE EXTREME PHYSICAL CONDITIONS
| Project/Area Number |
12305022
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
TAKEDA Kazuyoshi KYUSHU UNIVERSITY, Faculty of Engineering, Prof., 大学院・工学研究院, 教授 (10029548)
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| Co-Investigator(Kenkyū-buntansha) |
IDOGAKI Toshihiro KYUSHU UNIVERSITY, Faculty of Engineering, Prof., 大学院・工学研究院, 教授 (40038013)
HITAKA Masako KYUSHU UNIVERSITY, Faculty of Engineering, Assist., 大学院・工学研究院, 助手 (00264094)
KAWAE Tatsuya KYUSHU UNIVERSITY, Faculty of Engineering, Assist.Prof., 大学院・工学研究院, 助教授 (30253503)
TANAKA Akinori KYUSHU UNIVERSITY, Faculty of Engineering, Assist., 大学院・工学研究院, 助手 (80274512)
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| Project Period (FY) |
2000 – 2003
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| Keywords | Electronic Properties / High Pressure / High Magnetic Field / Low Temperature / Organic Magnets / Non-Fermi Liquid / Magnetic Behavior / Quantum Critical Point |
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| Research Abstract |
The first realization of the genuine organic ferromagnet had to await the synthesis of b-p-NPNN in 1990. The mechanism of magnetic interactions and high ordering temperature has not been clear now. We have marked the highest value of the magnetic ordering temperature of some 70K with a weak-ferromagnetic organic radical cry stal(the ordering temperature is 36K at ambient pressure) by the application of the pressure up to 1.6GPa.
The Non-Fermi liquid behavior in the non-magnetic quadrupolar system has been found in the present study on(Pr-La)Pb3 system for the dilute limit of Pr.
On the contrary for the wide range of the Prconcentration, the glassy behavior of the quadrupolar moment has been observed with the characteristic 2-level model as the Anderson's glass theory.
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[Publications] M.Mito, H.Deguchi, T.Tanimoto, T.Kawae, S.Nakatsuji, H.Morimoto, H.Anzai, H.Nakano, Y.Murakami, K.Takeda: "Pressure effects on an organic radical ferromagnet : 2,5-difluorophenyl-a-nitronyl nitoroxide"Physical Review. Vol.67. 024427 1-024427 8 (2003)
Description
「研究成果報告書概要(欧文)」より
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