AC conductivity and magnetoelectric effect in MnFe1.8Cr0.2O4-BaTiO3 composites

被引：90

作者：

Patankar, KK ^{[1
]}

Dombale, PD ^{[1
]}

Mathe, VL ^{[1
]}

Patil, SA ^{[1
]}

Patil, RN ^{[1
]}

机构：

[1] Shivaji Univ, Dept Phys, Kolhapur 416004, Maharashtra, India

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2001年 / 87卷 / 01期

关键词：

magnetoelectric composites; ceramic technique; X-ray analysis;

D O I：

10.1016/S0921-5107(01)00695-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetoelectric composites with composition xBaTiO(3) + (1 - x)MnFe1.8Cr0.2O4 in which x varies as 1, 0.85, 0.7, 0.55 and 0 were prepared by a standard ceramic technique. X-Ray analysis confirms single-phase formation in x = 1 and x = 0 compositions whereas the presence of both phases in x = 0.85, 0.7 and 0.55 compositions. The dielectric constant (epsilon '), loss tangent (tan delta) and AC conductivity (sigma (AC)) of the composites have been investigated in the frequency range 100 Hz-1 MHz and also in the temperature range 30-400 degreesC. The results obtained are interpreted in terms of a polaron hopping mechanism. Static magnetoelectric conversion factor (dE/dH) as a function of magnetic field was measured in x = 0.85, 0.70 and 0.55 compositions. The maximum value of dE/dH obtained was 150 muV/(cm(-1) x Oe) for x = 0.85 composition. (C) 2001 Published by Elsevier Science B.V.

引用

页码：53 / 58

页数：6

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