Magnetocaloric elffiect in La0.80-xCa0.20SrxMnO3 (x=0.05, 0.08, 0.10)

被引：17
作者：
Lin, GC [1 ]
Xu, CD [1 ]
Zhang, JX [1 ]
机构：
[1] Zhongshan Univ, Dept Phys, Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 283卷 / 2-3期
关键词：
magnetocaloric effect; adiabatic temperature change; La0.80-xCa0.20SrxMnO3; perovskite-type;
D O I：
10.1016/j.jmmm.2004.06.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
As x increases from 0.05 to 0. 10, the Curie temperature T-C of polycrystalline perovskites La0.80-xCa0.20SrxMnO3 increases from 264 to 310K, near room temperature. The adiabatic temperature change DeltaT(ad) resulting from the magnetocaloric effect in these materials was measured directly. DeltaT(ad) reaches its peak around T-C. Corresponding to x = 0.05, 0.08, and 0.10, the maximum value of DeltaT(ad) of La0.80-xCa0.20SrxMnO3 induced by a magnetic field change of 1.92T was 1.33, 1.48, and 1.51 K, respectively. DeltaT(ad) of La0.80-xCa0.20SrxMnO3 (x = 0.05, 0.08, 0.10) induced by a magnetic field change of 1.79 T is larger than I K in a temperature range of about 10 K. These results suggest that La0.80-xCa0.20SrxMnO3 is a potential material for magnetic refrigeration near room temperature. (C) 2004 Elsevier B.V. All rights reserved.
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收藏
页码：375 / 379
页数：5
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