2003 Fiscal Year Final Research Report Summary
Peculiar magnetization process and magnetism of PrCu_2Ge_2
| Project/Area Number |
14540339
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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 |
固体物性Ⅱ(磁性・金属・低温)
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| Research Institution | Yamaguchi University |
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Principal Investigator |
SHIGEOKA Toru Yamaguchi University, Faculty of Science, Professor, 理学部, 教授 (50167441)
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| Co-Investigator(Kenkyū-buntansha) |
UWATOKO Yoshiya University of Tokyo, Institute for Solid State Physics, Associate Professor, 物性研究所, 助教授 (40213524)
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| Project Period (FY) |
2002 – 2003
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| Keywords | PrCu_2Ge_2 / Irreversible magnetization process / Antiferromagnetism / Neutron diffraction / Tetragonal ternary compound / Specific heat / Electrical resistivity |
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| Research Abstract |
The tetragonal ternary compound shows a peculiar magnetization process and temperature dependence of magnetic susceptibility. This work has been performed to understand this magnetic behavior
1) This peculiar behavior is intrinsic nature for this compound because some single crystals made show the same behavior
2) The electrical resistivity shows a hysteresis and rapid change around 4 K, indicating the first order magntic transition
3) From neutron diffraction study, the transition at 4 K is an antiferromagnetic-antiferromagnetic transition where a simple antiferromagnetic structure changes a incommensurate long-range period structure
4) From measurement of specific heat, magnetic entropy is estimated to be Rln2 until TN, indicating that the ground state is a doublet. Hyperfine field is also estimated to be 3 Moe from low temperature specific heat which is comparable to one in Pr
These results will be presented at the International Conference on Strongly Correlated Electron Systems in July 2004 at Karlsruhe, Germany
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