Increase of the dielectric constant near a magnetic phase transition in La0.5Ca0.5MnO3

被引：14

作者：

Botta, P. M. ^{[1
]}

Mira, J. ^{[1
]}

Fondado, A. ^{[1
]}

Rivas, J. ^{[1
]}

机构：

[1] Univ Santiago de Compostela, Dept Fis Aplicada, Fac Fis, E-15782 Santiago De Compostela, Spain

来源：

MATERIALS LETTERS | 2007年 / 61卷 / 14-15期

关键词：

dielectrics; magnetic materials; semiconductors; manganites;

D O I：

10.1016/j.matlet.2006.10.060

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dielectric response of polycrystalline La0.5Ca0.5MnO3 as a function of frequency and temperature was studied. The semiconducting nature of this oxide gave rise to very high dielectric constant values, which were mainly attributed to interfacial polarization (grain boundaries and contacts sample-electrode). However, an increase of the permittivity at temperatures close to a magnetic phase transition suggests the contribution of intrinsic effects to the observed high dielectric constants. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：2990 / 2992

页数：3

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