Anomalous low-temperature specific heat of charge-ordered La0.5Ca0.5MnO3

被引：41
|
作者：
Smolyaninova, VN [1 ]
Ghosh, K [1 ]
Greene, RL [1 ]
机构：
[1] Univ Maryland, Dept Phys, Ctr Supercond Res, College Pk, MD 20742 USA
来源：
PHYSICAL REVIEW B | 1998年 / 58卷 / 22期
关键词：
D O I：
10.1103/PhysRevB.58.R14725
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report a study of the specific heat, resistivity, and magnetization of La1-xCaxMnOx for x = 0.47, 0.5, 0.53 with and without an applied magnetic field. In zero (earth) field we find that the charge-ordered materials (x = 0.5,0.53) have extra entropy of nonmagnetic origin at low temperature when compared to metallic and ferromagnetic compositions (x = 0.47,0.2). For the x = 0.5 compound the specific heat does not change in a 8.5 T field even though the resistivity decreases ten orders of magnitude.
引用
收藏
页码：14725 / 14728
页数：4
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