Magnetocaloric and transport study of poly- and nanocrystalline composite manganites La0.7Ca0.3MnO3/La0.8Sr0.2MnO3

被引：45

作者：

Pekala, M. ^{[1
]}

Pekala, K. ^{[2
]}

Drozd, V. ^{[3
]}

Staszkiewicz, K. ^{[1
,4
]}

Fagnard, J. -F. ^{[5
]}

Vanderbemden, P. ^{[5
]}

机构：

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

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

[3] Florida Int Univ, Ctr Study Matter Extreme Condit, Miami, FL 33199 USA

[4] Univ Warsaw, Coll Interfac Individual Studies Math & Nat Sci, PL-02089 Warsaw, Poland

[5] Univ Liege, Dept Elect Engn & Comp Sci B28, SUPRATECS, B-4000 Liege, Belgium

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 112卷 / 02期

关键词：

LA0.7CA0.3MNO3;

D O I：

10.1063/1.4739262

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetocaloric and transport properties are reported for novel poly-and nanocrystalline double composite manganites, La0.8Sr0.2MnO3/La0.7Ca0.3MnO3, prepared by the sol-gel method. Magnetic field dependence of magnetic entropy change is found to be stronger for the nano-than the polycrystalline composite. The remarkable broadening of the temperature interval, where the magnetocaloric effect occurs in poly-and nanocrystalline composites, causes the relative cooling power (RCP(S)) of the nanocrystalline composite to be reduced by only 10% compared to the Sr based polycrystalline phase. The RCP(S) of the polycrystalline composite becomes remarkably enhanced. The low temperature magnetoresistance is enhanced by 5% for the nanostructured composite. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4739262]

引用

页数：8

共 25 条

[1] Magnetocaloric properties of nanocrystalline Pr0.65(Ca0.6Sr0.4)0.35MnO3 [J].