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
收藏
页码：3894 / 3903
页数：10
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