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A real-space non-local phase-field model of ferroelectric domain patterns in complex geometries

Dayal, Kaushik and Bhattacharya, Kaushik (2007) A real-space non-local phase-field model of ferroelectric domain patterns in complex geometries. Acta Materialia, 55 (6). pp. 1907-1917. ISSN 1359-6454.

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Ferroelectric perovskites are used in various transducer, memory and optical applications due to their attractive properties. In these applications, the ferroelectric materials often have complex geometries and electrode arrangements, and are subjected to domain switching. Therefore, it is important to understand the domain pattern that forms in these geometries. However, models of domain evolution often make assumptions like periodicity and complete shielding which make them unrealistic for these applications. In this paper, we develop a phase-field approach that can study domain patterns and domain evolution in complex geometries with no a priori assumption on geometry, electrode arrangement, and dielectric properties. The key idea is a boundary element method to resolve the electrostatic fields. We illustrate the method by examining the closure domains that form at a free surface and domain switching under cyclic electric field in a device with interdigitated electrodes.

Item Type:Article
Related URLs:
URLURL TypeDescription
Dayal, Kaushik0000-0002-0516-3066
Bhattacharya, Kaushik0000-0003-2908-5469
Additional Information:© 2006 Acta Materialia Inc. Published by Elsevier Ltd. Received 26 August 2006; received in revised form 10 October 2006; accepted 23 October 2006; Available online 10 January 2007. This work draws from the doctoral dissertation of Kaushik Dayal at the California Institute of Technology. We are glad to acknowledge the partial financial support of the US Army Research Office through the MURI Grant No. DAAD 19-01-1-0517.
Funding AgencyGrant Number
Army Research Office (ARO)DAAD 19-01-1-0517
Subject Keywords:ferroelectrics; phase-field models; boundary element method (BEM); domain patterns; free surfaces
Issue or Number:6
Record Number:CaltechAUTHORS:20131008-075822606
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Official Citation:Kaushik Dayal, Kaushik Bhattacharya, A real-space non-local phase-field model of ferroelectric domain patterns in complex geometries, Acta Materialia, Volume 55, Issue 6, April 2007, Pages 1907-1917, ISSN 1359-6454, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41726
Deposited By: Tony Diaz
Deposited On:08 Oct 2013 22:02
Last Modified:03 Oct 2019 05:51

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