Kondo and magnetic ordering anomalies in Ce2-xRxPtSi3 (R = La, Y)

被引：0

作者：

Sengupta, Kausik ^{[1
]}

Paulose, P. L. ^{[1
]}

Sampathkumaran, En. ^{[1
]}

机构：

[1] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

来源：

PHYSICA B-CONDENSED MATTER | 2006年 / 378-80卷 / SPEC. ISS.期

关键词：

Ce2PtSi3; Kondo effect; magnetic ordering;

D O I：

10.1016/j.physb.2006.01.310

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The compound Ce2PtSi3 crystallizing in the AlB2-derived hexagonal structure has been known to undergo magnetic ordering around (T-0 =) 5.5 K. We have investigated the influence of positive and negative chemical pressure on the Kondo effect and T-0 by studying Y and La substituted pseudo-ternary solid solutions Ce2-xRxPtSi3 (R = La, Y) by AC and DC magnetic susceptibility, and heat capacity measurements. We find that the dilution of Ce sub-lattice by Y substitution is less effective in reducing To when compared with La substituted series. The Kondo temperature as inferred from paramagnetic Curie temperature undergoes an increase with increasing La content, rather than a decrease usually expected for weakening Kondo effect following lattice expansion. This unusual Kondo and magnetic ordering behavior of this solid solution possibly arises from disorder and/or structural features. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：843 / 844

页数：2