Intermediate valence in the filled skutterudite compound YbFe4Sb12

被引：142

作者：

Dilley, NR ^{[1
]}

Freeman, EJ

Bauer, ED

Maple, MB

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.58.6287

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have synthesized and characterized YbFe4Sb12, a member of the class of filled skutterudite (LaFe4P12-type) compounds. Measurements of the lattice parameter, magnetization, electrical resistivity, and specific heat suggest that the Yb ions have an intermediate valence and that the effective mass of the conduction electrons is moderately enhanced at low temperatures. The coefficient of the electronic specific heat is estimated to be gamma(0) = 140 mJ mol(-1) K-2, and we observe a characteristic temperature for the Yb ion valence fluctuations of T* similar to 50 K. No superconductivity was detected down to T = 0.40 K.

引用

页码：6287 / 6290

页数：4

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