ELECTRICAL-CONDUCTIVITY BEHAVIOR OF THE SOLID-SOLUTION BA1-XLAXTI1-XCOXO3

被引：18

作者：

KUMAR, D

PRASAD, CD

PARKASH, O

机构：

[1] Department of Ceramic Engineering, Institute of Technology, Banaras Hindu University Varanasi

[2] School of Materials Science and Technology, Institute of Technology, Banaras Hindu University Varanasi

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1990年 / 51卷 / 01期

关键词：

barium lanthanum titanium cobalt-oxide; electrical conductivity; Perovskite; Seebeck coefficient; solid solution;

D O I：

10.1016/0022-3697(90)90134-2

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The d.c. resistivity and Seebeck coefficient were measured as a function of temperature in the Ba1-xLaxTi1-xCoxO3 system for samples with x ≤ 0.50 in the 300-800 K temperature range. The a.c. conductivity was measured as a function of temperature and frequency for samples with x ≤ 0.20. The a.c. conductivity data indicate that conduction occurs among localized sites giving rise to Debye-type loss at low temperatures. The results of d.c. conductivity measurements combined with a.c. conductivity data at high temperatures indicate that electrical transport occurs by the excitation of charge carriers near the valence band edge and hopping as small polarons at energies close to it. © 1990.

引用

页码：73 / 78

页数：6

共 25 条

[1] POLARONS IN CRYSTALLINE AND NON-CRYSTALLINE MATERIALS [J].