Composition dependence of piezoelectric constant and dielectric constant tunability in the < 001 >-oriented Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
Document Type
Article
Publication Date
1-1-2004
Abstract
Composition dependence of room temperature piezoelectric constant d(33) and dielectric constant tunability was investigated in the (001)-poled single crystals of (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) with x varying from 0.24 to 0.38. Temperature, frequency and composition dependence of the dielectric constant in the unpoled crystals shows that the critical composition for the relaxor state lies in the 0.69Pb(Mg-1/3 Nb-2/3)O-3-0.31PbTiO(3) crystal. It has also the largest piezoelectric constant d(33) of 2210 pC/N and highest dielectric constant tunability of 40.6% (at a dc bias of 1000 V/mm). The experiment results validate the prediction that the relaxor-based materials with the critical composition for the relaxer state will have the highest piezoelectric susceptibility. (C) 2004 Elsevier B.V. All rights reserved.
Keywords
Ferroelectrics, Piezoelectric Materials, Pmn-Pt, Critical Composition, Relaxor, Piezoelectric Constant, Dielectric Constant Tunability
Divisions
PHYSICS
Publication Title
Materials Letters
Volume
58
Issue
14
Additional Information
Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA