Large magnetic entropy change in perovskite-type manganese oxides

被引：715

作者：

Guo, ZB

Du, YW

Zhu, JS

Huang, H

Ding, WP

Feng, D

机构：

[1] National Laboratory of Solid State Microstructures, Nanjing University, Nanjing

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.78.1142

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic entropy change larger than that of gadolinium has been observed in polycrystalline of La1-xCaxMnO3 (x = 0.2 and 0.33) perovskite-type manganese oxide. The large magnetic entropy change produced by the abrupt reduction of magnetization is attributed to the anomalous thermal expansion just at the Curie temperature. The considerable magnetic entropy change was also observed in La0.75Sr0.25-yCayMnO3 near room temperature. The phenomenon of large magnetic entropy change and the convenient adjustment of the Curie temperature make the perovskite-type manganese oxides useful for magnetic refrigerants in an extended high temperature range even at room temperature.

引用

页码：1142 / 1145

页数：4

共 27 条

[1]

ADACHI K, 1961, J PHYS SOC JPN, V61, P2187

[2] Lattice effects and magnetic order in the canted ferromagnetic insulator La(0.87)5Sr(0.125)MnO(3+delta) [J].