Suppression of antiferromagnetism by Kondo effect and quantum critical behavior in CeCoGe3-xSix (0≤x≤3)

被引：47

作者：

Eom, D ^{[1
]}

Ishikawa, M ^{[1
]}

Kitagawa, J ^{[1
]}

Takeda, N ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 106, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 07期

关键词：

CeCoGe3-xSix; specific heat; magnetic susceptibility; electrical resistivity; Kondo effect; non-fermi liquid; valence fluctuations;

D O I：

10.1143/JPSJ.67.2495

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Several pseudoternary compounds of the CeCoGe3-xSix system were studied by magnetic-susceptibility, electrical-resistivity and specific-heat measurements. Substitution of silicon for germanium generates the normal chemical pressure and enhances the exchange interaction. The antiferromagnetism in CeCoGe3 is ultimately suppressed around x = 1.2 by the enhanced Kondo effect. Non-Fermi liquid-like behavior has been observed around the critical concentration and an intermediate-valence regime with a very high Kondo temperature of the order of 900 K is followed farther on in the silicon rich region.

引用

页码：2495 / 2500

页数：6

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