Structural characterization, magnetic properties and magnetocaloric effects of La0.75Sr0.25Mn1-x Cr x O3 (x=0.15, 0.20, and 0.25)

被引：38

作者：

Dhahri, Ah. ^{[1
]}

Dhahri, E. ^{[1
]}

Hlil, E. K. ^{[2
,3
]}

机构：

[1] Univ Sfax, Lab Phys Appl, Fac Sci Sfax, Sfax 3000, Tunisia

[2] CNRS, Inst Neel, F-38042 Grenoble, France

[3] Univ Grenoble 1, F-38042 Grenoble, France

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2014年 / 116卷 / 04期

关键词：

TRANSITION;

D O I：

10.1007/s00339-014-8404-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Cr doping on the structural, magnetic and magnetocaloric properties of perovskite manganites La0.75Sr0.25Mn1-x Cr (x) O-3 (x = 0.15, 0.20, and 0.25) has been investigated. Crystalline structure and magnetic properties are investigated by using X-ray powder diffraction and magnetization measurements, respectively. All samples show a single phase and are found to crystallize in the distorted rhombohedral system with space group. A monotonous change of Curie temperature (T (C)), from 314 to 253 K, is observed when content doping increases. Substantial magnetic entropy change reaching 4.20 J/kg K is revealed. Relative cooling power was estimated as well. It was found to reach 289, 323, and 386 J/kg for x = 0.15, 0.20, and 0.25, respectively. Field dependence of the magnetic entropy change showing the power law dependence is also analyzed and discussed.

引用

页码：2077 / 2085

页数：9

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