Self-consistent model of polarization switching kinetics in disordered ferroelectrics

Genenko, Yuri A. and Wehner, Jens and von Seggern, Heinz (2013):
Self-consistent model of polarization switching kinetics in disordered ferroelectrics.
In: Journal of Applied Physics, 114 (8), AIP Publishing LLC, pp. 084101(1-6), ISSN 00218979,
[Online-Edition: http://dx.doi.org/10.1063/1.4818951],
[Article]

Official URL: http://dx.doi.org/10.1063/1.4818951

Abstract

A self-consistent two-dimensional model of polarization switching in polycrystalline ferroelectrics is developed. It accounts for the statistical distribution of the local switching times due to the random spatial field distribution as well as for the feedback effect of the depolarization field changing during the switching process. Thereby the polarization response of each single-crystalline grain is modeled in the spirit of the Kolmogorov-Avrami-Ishibashi model while the electric field in the system is evaluated by a finite-element method at every iteration step. The results exhibit fair agreement with experiments on bulk ferroelectrics.

Item Type:	Article
Erschienen:	2013
Creators:	Genenko, Yuri A. and Wehner, Jens and von Seggern, Heinz
Title:	Self-consistent model of polarization switching kinetics in disordered ferroelectrics
Language:	English
Abstract:	A self-consistent two-dimensional model of polarization switching in polycrystalline ferroelectrics is developed. It accounts for the statistical distribution of the local switching times due to the random spatial field distribution as well as for the feedback effect of the depolarization field changing during the switching process. Thereby the polarization response of each single-crystalline grain is modeled in the spirit of the Kolmogorov-Avrami-Ishibashi model while the electric field in the system is evaluated by a finite-element method at every iteration step. The results exhibit fair agreement with experiments on bulk ferroelectrics.
Journal or Publication Title:	Journal of Applied Physics
Volume:	114
Number:	8
Publisher:	AIP Publishing LLC
Uncontrolled Keywords:	dielectric polarisation, ferroelectric materials, finite element analysis, SCF calculations
Divisions:	11 Department of Materials and Earth Sciences > Material Science > Electronic Materials 11 Department of Materials and Earth Sciences > Material Science > Materials Modelling DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B7: Polarisation and charging in electrical fatigue ferroelectrics 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 > C - Modelling > Subproject C5: Phenomenological modelling of injection, transport and recombination in organic semiconducting devices as well as in inorganic ferroelectric materials 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences Zentrale Einrichtungen DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited:	27 Aug 2013 08:55
Official URL:	http://dx.doi.org/10.1063/1.4818951
Additional Information:	SFB 595 Cooperation B7,C5
Identification Number:	doi:10.1063/1.4818951
Funders:	This work was supported by the Deutsche Forschungsgemeinschaft through the Sonderforschungsbereich 595 “Electrical Fatigue in Functional Materials.”
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