Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/7957
Title: Dipole alignment and dielectric susceptibility of defective ferroelectric : Monte-Carlo simulation
Authors: Liu, JM
Wang, KF
Lau, ST
Chan, HLW 
Choy, CL
Keywords: Dielectric susceptibility
Ferroelectric relaxor
Random defect model
Issue Date: 2005
Publisher: Elsevier
Source: Computational materials science, 2005, v. 33, no. 1-3, p. 66-73 How to cite?
Journal: Computational materials science 
Abstract: We present a Monte-Carlo simulation on the dipole alignment configuration and dielectric susceptibility of a defective ferroelectric lattice with randomly distributed lattice defects in the framework of the Ginzburg-Landau theory. These defects are assumed to suppress locally the electric dipoles. It is found that with increasing defect concentration the dipole lattice configuration evolves from a normal ferroelectric state to a two-phase coexisted state, where highly polarized regions are embedded in a paraelectric matrix. The dielectric susceptibility in lattices with various defect distributions is studied. The simulated results are used to explain the measured dielectric response in ferroelectric copolymers containing defects induced by proton irradiation.
Description: Proceedings of the E-MRS 2004 Spring Meeting: Symposium H: Atomic Materials Design: Modelling and Characterization, 24-28 May 2004
URI: http://hdl.handle.net/10397/7957
ISSN: 0927-0256
DOI: 10.1016/j.commatsci.2004.12.034
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