Magnetocaloric properties of the La0.7-xYxSr0.3MnO3 giant magnetoresistance ceramics

被引：25

作者：

Bose, TK ^{[1
]}

Chahine, R

Gopal, BR

Foldeaki, M

Barman, A

Gosh, M

De, SK

Chatterjee, S

机构：

[1] Univ Quebec Trois Rivieres, Hydrogen Res Inst, Trois Rivieres, PQ G9A 5H7, Canada

[2] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, W Bengal, India

来源：

CRYOGENICS | 1998年 / 38卷 / 08期

基金：

加拿大自然科学与工程研究理事会;

关键词：

magnetic refrigeration; magnetocaloric effects; giant magnetoresistance; magnetic entropy; magnetization;

D O I：

10.1016/S0011-2275(98)00058-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Giant magnetoresistance (GMR), observed in several La(0.7x)A(0.3)MnO(3) ceramics, where A is a two-valent addition, is the result of an interaction of conduction electrons and intrinsic magnetization, which is likely to result in unusual magnetocaloric effects. On this basis, magnetization, magnetic entropy change and adiabatic temperature change were measured as a function of Y content in La0.7-xYxSr0.3MnO3 ceramics. It is found that doping influences only the transition temperature, while the magnetic entropy change remains constant and displays a saturation tendency in high fields. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.

引用

页码：849 / 851

页数：3

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