Electrical behaviour of 0.8OPb[(Mg,Zn)1/3Ta2/3]O3-0.20PbTiO3 relaxor

被引：7

作者：

Prasad, S

Prasad, K ^{[1
]}

Choudhary, SN

Sinha, TP

机构：

[1] TM Bhagalpur Univ, Dept Phys, Bhagalpur 812007, India

[2] Bose Inst, Dept Phys, Kolkata 700009, India

来源：

PHYSICA B-CONDENSED MATTER | 2005年 / 364卷 / 1-4期

关键词：

relaxor ferroelectrics; diffuse phase transition; dielectric properties; dielectric relaxation;

D O I：

10.1016/j.physb.2005.04.014

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Polycrystalline 0.80Pb[(Mg2/3Zn1/3)(1/3)Ta-2/3]O-3-0.20PbTiO(3) (PMZT-PT) having a tetragonal perovskite type structure was prepared by the high temperature solid-state reaction method. Dielectric studies showed the relaxor behaviour with diffuse phase transition. High value of epsilon(m) > 8000 was realized with T-m (phase transition temperature) at 57 degrees C at 1 kHz. The frequency dependence of T-m has been modeled using Vogel Fulcher relation. The dielectric relaxation in the present system was found analogous to the magnetic relaxation in spin-glass system. Complex impedance analysis indicated the system undergoing a polydispersive non-Debye type dielectric relaxation. The relaxation behaviour in PMZT-PT was also probed through admittance spectroscopy. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：206 / 212

页数：7

共 26 条

[1] Dielectric spectra and Vogel-Fulcher scaling in Pb(In0.5Nb0.5)O3 relaxer ferroelectric [J].