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Large magnetic-entropy change above 300 K in CMR materials

被引：95
作者：
Phan, MH
Tian, SB
Hoang, DQ
Yu, SC [1 ]
Nguyen, C
Ulyanov, AN
机构：
[1] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea
[2] Natl Acad Sci, Donetsk Physicotech Inst, UA-83114 Donetsk, Ukraine
[3] Natl Univ Hanoi, Ctr Mat Sci, Hanoi, Vietnam
[4] Natl Acad Sci, Donetsk Physicotech Inst, UA-83114 Donetsk, Ukraine
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2003年 / 258卷
关键词：
entropy; magnetocaloric effect; magnetic refrigeration; perovskite; double exchange;
D O I：
10.1016/S0304-8853(02)01151-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A large magnetic-entropy change DeltaS(M) associated with the ferromagnetic-paramagnetic transition in CMR materials (La0.65Sr0.35MnO3, La0.6Sr0.2Ca0.2MnO3, La0.6Sr0.2Ba0.2MnO3 and La0.7Ca0.06Ba0.24MnO3) has been observed. It is shown that the DeltaS(M) reaches a maximum value of 2.26 J/kg/K for La0.6Sr0.2Ba0.2MnO3 composition at Curie temperature of 354K, upon 10 kOe applied field variation. Due to the large DeltaS(M) and high Curie temperature, these CMR materials are suggested to use as active magnetic refrigerants for magnetic refrigeration technology above room temperature. (C) 2002 Elsevier Science B.V. All rights reserved.
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收藏
页码：309 / 311
页数：3
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