Glassy dynamics of the inhomogeneous metallic phase in La1-xCaxMnO3 -: art. no. 012403

被引：32

作者：

Cordero, F

Castellano, C

Cantelli, R

Ferretti, M

机构：

[1] CNR, Ist Acust OM Corbino, I-00133 Rome, Italy

[2] Unita INFM Roma 1, I-00185 Rome, Italy

[3] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[4] Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy

[5] Unita INFM Genova, I-16146 Genoa, Italy

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.65.012403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The anelastic spectra (elastic energy loss and dynamic modulus versus temperature) of La1-xCaxMnO3 have been measured for 0.33<x<0.5. A peak in the imaginary part of the elastic susceptibility is found slightly below the Curic temperature, whose temperature and frequency dependences are typical of the dielectric and magnetic susceptibilities of relaxor ferroelectrics, spin glasses and other inhomogeneous frustrated systems. The fluctuations can be associated with the magnetic clusters which are observed by several techniques or with charge-ordered insulating domains in the low temperature inhomogeneous phase. The temperature dependent distribution function of the fluctuation energy barriers has been extracted by an analysis of the experimental curves.

引用

页码：1 / 4

页数：4

共 22 条

[1] First order nucleation of charge ordered domains in La0.5Ca0.5MnO3 detected by 139La and 55Mn NMR [J].