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Drift of charged defects in local fields as aging mechanism in ferroelectrics

Genenko, Yuri A. and Lupascu, Doru C. (2007):
Drift of charged defects in local fields as aging mechanism in ferroelectrics.
In: Physical Review B, pp. 184107-1, 75, (18), ISSN 1098-0121, [Online-Edition: http://dx.doi.org/10.1103/PhysRevB.75.184107],
[Article]

Abstract

Point defect migration is considered as a mechanism for aging in ferroelectrics. Numerical results are given for the coupled problems of point defect migration and electrostatic energy relaxation in a two-dimensional domain configuration. The peak values of the clamping pressure at domain walls are in the range of 106 Pa, which corresponds to macroscopically observed coercive stresses in perovskite ferroelectrics. The effect is compared to mechanisms involving orientational reordering of defect dipoles in the bulk of domains. Domain clamping is significantly stronger in the drift mechanism than in the orientational picture for the same material parameters.

Item Type: Article
Erschienen: 2007
Creators: Genenko, Yuri A. and Lupascu, Doru C.
Title: Drift of charged defects in local fields as aging mechanism in ferroelectrics
Language: English
Abstract:

Point defect migration is considered as a mechanism for aging in ferroelectrics. Numerical results are given for the coupled problems of point defect migration and electrostatic energy relaxation in a two-dimensional domain configuration. The peak values of the clamping pressure at domain walls are in the range of 106 Pa, which corresponds to macroscopically observed coercive stresses in perovskite ferroelectrics. The effect is compared to mechanisms involving orientational reordering of defect dipoles in the bulk of domains. Domain clamping is significantly stronger in the drift mechanism than in the orientational picture for the same material parameters.

Journal or Publication Title: Physical Review B
Volume: 75
Number: 18
Uncontrolled Keywords: SPACE-CHARGE; THIN-FILMS; DOPED BATIO3; DOMAIN STABILIZATION; INTERNAL INTERFACES; ELECTRON HOLOGRAPHY; TITANATE CERAMICS; GRAIN-BOUNDARIES; SINGLE-CRYSTALS; BARIUM TITANATE
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > C - Modelling > Subproject C5: Phenomenological modelling of injection, transport and recombination in organic semiconducting devices as well as in inorganic ferroelectric materials
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties > Subproject D1: Mesoscopic and macroscopic fatigue in doped ferroelectric ceramics
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > C - Modelling
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 18 May 2011 15:20
Official URL: http://dx.doi.org/10.1103/PhysRevB.75.184107
Additional Information:

SFB 595 Cooperation C5, D1

Identification Number: doi:10.1103/PhysRevB.75.184107
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