Evolution from Kondo lattice to single-ion Kondo behaviour in Ce1-xLaxCu4Al system

被引：8

作者：

Falkowski, M. ^{[1
]}

Kowalczyk, A. ^{[1
]}

Tolinski, T. ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland

来源：

SOLID STATE COMMUNICATIONS | 2010年 / 150卷 / 33-34期

关键词：

Metals; Electronic states (localized); Heavy fermions; Kondo effects; HEAVY-FERMION COMPOUND; CECU4GA;

D O I：

10.1016/j.ssc.2010.06.003

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetic susceptibility chi(T) and electrical resistivity rho(T) of polycrystalline Ce1-xLaxCu4Al (0.0 <= x <= 1.0) are presented. Magnetic ordering was not observed down to 2 K. The effective magnetic moment values obtained across the series are in fair agreement with the value 2.54 mu(B)/Ce that corresponds to a free Ce3+ ion. Electrical resistivity studies illustrate the evolution from the Kondo lattice model to single-ion Kondo behavior with an increase in La content in the Ce1-xLaxCu4Al alloy series. A compressible Kondo lattice model has been used to describe the decrease in the Kondo temperature T-K and maximum in electrical resistivity T-max with the decrease in Ce concentration for these compounds. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1548 / 1551

页数：4

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