Transition from magnetic to nonmagnetic ground state in a heavy-fermion compound Ce7Ni3 under high pressure
Physical Review B - Condensed Matter and Materials Physics 54 巻 2 号
1194-1198 頁
1996-07-01 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Transition from magnetic to nonmagnetic ground state in a heavy-fermion compound Ce7Ni3 under high pressure
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| 作成者 |
Kadomatsu Hideoki
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| 収録物名 |
Physical Review B - Condensed Matter and Materials Physics
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| 巻 | 54 |
| 号 | 2 |
| 開始ページ | 1194 |
| 終了ページ | 1198 |
| 抄録 |
The electrical resistivity and ac magnetic susceptibility of the heavy-fermion compound Ce7Ni3 were measured in the temperature range from 0.4 to 300 K and in the pressure range up to 1.5 GPa. The Ne?el temperature of 1.9 K for antiferromagnetic transition at ambient pressure decreases with increasing pressure and vanishes at about 0.33 GPa. The magnetic resistivity, ρm=ρ(Ce7Ni3)-ρ(La 7Ni3), decreases steeply with pressure, and above 0.66 GPa, ρm(T) can be described by the expression ρm(T)=ρm(0)+AT2. The coefficient A decreases and the temperature range in which the T2 dependence is held becomes wider with increasing pressure. The electronic Gru?neisen parameter for the Kondo temperature TK, -∂lnTK/∂lnV, is evaluated to be 132 from the pressure dependence of A. This value is larger than that of typical heavy-fermion compounds. The results are discussed in relation to the competition between the magnetic interaction and the Kondo interaction in Ce7Ni3.
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 1996-07-01 |
| 権利情報 |
Copyright (c) 1996 The American Physical Society.
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.54.1194
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.59.13878
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