Magnetocaloric and Colossal Magnetoresistance Effect in Layered Perovskite La1.4Sr1.6Mn2O7

被引：31
|
作者：
Han, Li'an [1 ,2 ]
Chen, Changle [1 ]
机构：
[1] Northwestern Polytech Univ, Sch Sci, Xian 710072, Peoples R China
[2] Xian Univ Sci & Technol, Dept Appl Phys, Xian 710054, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2010年 / 26卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Magnetocaloric effect; Layered perovskite; Colossal magnetoresistance; GIANT MAGNETORESISTANCE; MANGANITES; RESISTIVITY;
D O I：
10.1016/S1005-0302(10)60039-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Magnetocaloric and colossal magnetoresistance effects of the layered perovskite La1.4Sr1.6Mn2O7 compound have been studied. A broad peak of magnetic entropy change (-Delta S-M) is found above the Curie temperature (T-C=120 K), which can be associated with the existence of two-dimensional short range ferromagnetic order. Additionally, the curvilinear shape of -Delta S-M for layered perovskite is quite different from that of the Ln(1-x)A(x)MnO(3) probably arising from magnetocrystalline anisotropy. At the same time, a wide peak of colossal magnetoresitance effect near T-C is found in the layered provskite La1.4Sr1.6Mn2O7.
引用
收藏
页码：234 / 236
页数：3
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