Magnetocaloric study of monovalent-doped manganites Pr0.6Sr0.4-x Na x MnO3 (x=0-0.2)

被引：34

作者：

Thaljaoui, R. ^{[1
,2
,3
]}

Boujelben, W. ^{[1
]}

Pekala, K. ^{[2
]}

Pekala, M. ^{[3
]}

Cheikhrouhou-Koubaa, W. ^{[1
]}

Cheikhrouhou, A. ^{[1
,4
]}

机构：

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

[2] Warsaw Univ Technol, Fac Phys, PL-00662 Warsaw, Poland

[3] Univ Warsaw, Dept Chem, PL-02089 Warsaw, Poland

[4] CNRS, Inst Neel, F-38042 Grenoble 9, France

来源：

JOURNAL OF MATERIALS SCIENCE | 2013年 / 48卷 / 11期

关键词：

MAGNETOTRANSPORT PROPERTIES; TEMPERATURE; MANGANESE; PHASE; FIELD; SR;

D O I：

10.1007/s10853-013-7191-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A systematic investigation of structural, magnetic, and magnetocaloric properties is reported for a series of monovalent sodium-doped manganites Pr0.6Sr0.4-x Na (x) MnO3 (x = 0, 0.05, 0.1, 0.15, and 0.2). Rietveld refinements of the X-ray diffraction patterns show that all powder samples are single-phased and crystallized in the orthorhombic structure with Pnma space group. Magnetic characterization and Arrott plot confirm the second-order phase transition at Curie temperature T (C) decreasing from 310 K for x = 0 down to 272 K for x = 0.2. Magnetic entropy change is largest for x = 0 reaching 1.95 J kg(-1) K-1 at 2 T field. This corresponds to a large relative cooling power of 102 J kg(-1) . Magnetic field sensitivity of magnetic entropy change and relative cooling power are analyzed and discussed.

引用

页码：3894 / 3903

页数：10

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