Large low temperature magnetoresistance and magnetic anomalies in Tb2PdSi3 and Dy2PdSi3

被引：91

作者：

Mallik, R ^{[1
]}

Sampathkumaran, EV ^{[1
]}

Paulose, PL ^{[1
]}

机构：

[1] Tata Inst Fundamental Res, Mumbai 400005, India

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 106卷 / 03期

关键词：

magnetically ordered materials; electronic transport; heat capacity; order-disorder effects; phase transitions;

D O I：

10.1016/S0038-1098(98)00012-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The results of heat-capacity (C), magnetic susceptibility (chi), electrical resistivity (rho) and magnetoresistance (Delta rho/rho) measurements on the compounds, Tb2PdSi3 and Dy2PdSi3, are reported. The results establish that these compounds undergo long-range magnetic ordering (presumably with a complex magnetic structure) below (T-c =) 23 and 8 K, respectively. The Delta rho/rho is negative in the vicinity of T-c and the magnitude grows as T-c is approached from higher temperatures as in the case of well-known giant magnetoresistance systems (La manganite-based perovskites); this is attributed to the formation of some kind of magnetic polarons. The magnitude of Delta rho/rho at low temperatures is quite large, for instance, about 30% in the presence of 60 kOe field at 5 K in Dy sample. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：169 / 172

页数：4

共 21 条

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