Impedance spectroscopy study of polycrystalline Bi6Fe2Ti3O18

被引：100

作者：

Srinivas, K

Sarah, P ^{[1
]}

Suryanarayana, SV

机构：

[1] CVR Coll Engn, Dept Phys, Mangalpalli 501510, India

[2] Osmania Univ, Dept Phys, Hyderabad 500007, Andhra Pradesh, India

来源：

BULLETIN OF MATERIALS SCIENCE | 2003年 / 26卷 / 02期

关键词：

BLSF; equivalent circuit; ferroelectric; impedance; polaron hopping;

D O I：

10.1007/BF02707799

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electrical properties of polycrystalline Bi6Fe2Ti3O18 are investigated by impedance spectroscopy in the temperature range 30-550degreesC. The imaginary part of impedance as a function of frequency shows Debye like relaxation. Impedance data are presented in the Nyquist plot which is used to identify an equivalent circuit and the fundamental circuit parameters are determined at different temperatures. The grain and grain-boundary contributions are estimated. The results of bulk a.c. conductivity as a function of temperature and frequency are presented. The activation energies for the a.c. conductivity are calculated. The polaron hopping frequencies are estimated from the a.c. conductivity data.

引用

页码：247 / 253

页数：7

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