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

被引：42

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

页码：14725 / 14728

页数：4

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