Superconducting and magnetic properties of filled skutterudite compounds RERu4Sb12 (RE=La, Ce, Pr, Nd and Eu)

被引：175

作者：

Takeda, N ^{[1
]}

Ishikawa, M ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 1068666, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2000年 / 69卷 / 03期

关键词：

filled skutterudite; Van Vleck paramagnetism; superconductivity; non-Fermi liquid;

D O I：

10.1143/JPSJ.69.868

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied superconducting and magnetic properties of RERu4Sb12 prepared by an Sb-flux method and found that LaRu4Sb12 is superconducting below 3.58 K and PrRu4Sb12 is a Van Vleck paramagnet which becomes superconducting below 1.04 K. CeRu4Sb12 is a unique substance which shows intermediate-valence behavior with a characteristic broad peak around 100 K in the magnetic susceptibility and Kondo-like behavior in the electrical resistivity at high temperatures. Furthermore, non-Fermi liquid behavior is observed in the specific heat and electrical resistivity at low temperatures. NdRu4Sb12 and EuRu4Sb12 show a magnetic transition at 1.3 K and 3.3 K, respectively.

引用

页码：868 / 873

页数：6

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