The magnetic entropy change in the double perovskite La2NiMnO6 with strong spin-phonon coupling

被引：22

作者：

Luo, X.

Sun, Y. P. ^{[1
]}

Wang, B.

Zhu, X. B.

Song, W. H.

Yang, Z. R.

Dai, J. M.

机构：

[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 2009年 / 149卷 / 19-20期

基金：

中国国家自然科学基金;

关键词：

Double perovskite; Critical behavior; ROOM-TEMPERATURE;

D O I：

10.1016/j.ssc.2009.02.020

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetocaloric effect and the critical behavior of La2NiMnO6 are investigated by measurement of the magnetization around T-C. The magnetic entropy change vertical bar Delta S vertical bar of La2NiMnO6 for a field change of 0-45 kOe near the Curie temperature is about 5% of the theoretical expectation. The critical behavior of the La2NiMnO6 deviates from the mean field theory. These abnormal phenomena are understood in the context of the strong spin-phonon coupling in La2NiMnO6. It is suggested that a method of modulating this coupling would enhance the magnetic entropy change greatly, which makes the La2NiMnO6 a promising candidate for room-temperature magnetic refrigeration. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.

引用

页码：810 / 813

页数：4

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