2005年1月
Nonmagnetic heavy-fermion superconductor, CePt3Si
SOLID STATE COMMUNICATIONS
- ,
- 巻
- 133
- 号
- 4
- 開始ページ
- 249
- 終了ページ
- 251
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.ssc.2004.10.032
- 出版者・発行元
- PERGAMON-ELSEVIER SCIENCE LTD
We have studied the effect of heat treatment and the Ge substitution in place of Si in the recently discovered heavy-fermion superconductor CePt3Si. The annealed CePt3Si exhibited nonmagnetic heavy-fermion behavior instead of the antiferromagnetism (AF) found in quenched samples. The AF state was destroyed by only about 1 at.% of Ge-substitution and may not be a stable phase. Specific-heat measurements on the annealed CePt3Si and the Ge-substituted samples revealed a large hump around 2.2 K, originally claimed as Neel temperature. Its true nature is not clarified yet but conjectured at present as a sort of quadrupolar transition rather than AF long-range order. The superconducting transition around 0.75 K was equally sharp with DeltaC(P)/gammaT(c) = 0.7 for clean quenched and annealed samples. The interplay between the 2.2 K-anomaly and the superconductivity is discussed. (C) 2004 Elsevier Ltd. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.ssc.2004.10.032
- ISSN : 0038-1098
- Web of Science ID : WOS:000226507000009