Dielectric properties and relaxation behavior of [TMA]2Zn0.5Cu0.5Cl4 compound

被引：69

作者：

Karoui, K. ^{[1
]}

Ben Rhaiem, A. ^{[1
]}

Guidara, K. ^{[1
]}

机构：

[1] Univ Sfax, Fac Sci, Condensed Matter Lab, Sfax 3000, Tunisia

来源：

PHYSICA B-CONDENSED MATTER | 2012年 / 407卷 / 03期

关键词：

TMA](2)Zn0.5Cu0.5Cl4: Ferroelectric; Modulus complex; Conductivity; PHASE-TRANSITIONS; MIXED-CRYSTALS; CONDUCTIVITY; CERAMICS;

D O I：

10.1016/j.physb.2011.11.021

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The [TMA](2)Zn0.5Cu0.5Cl4 hybrid material was prepared and its dielectric spectra were measured in the 10(-1) Hz-10(6) Hz frequency range and 200-305 K temperature interval. The dielectric permittivity showed a ferroelectric-paraelectric phase transition at 293 K. Double relaxation peaks are observed in the imaginary part of the electrical modulus, suggesting the presence of grain and grain boundary in the sample. The frequency dependent conductivity was interpreted in term of Jonscher's law: sigma(omega) = sigma(dc) + A omega(n). The temperature dependent of the dc conductivity (sigma(dc)) was well described by the Arrhenius equation: sigma T-dc = sigma(0) x exp(-E-a/kT). (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：489 / 493

页数：5

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