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Polarization switching dynamics by inhomogeneous field mechanism in ferroelectric polymers

Schütrumpf, Jörg and Zhukov, Sergey and Genenko, Yuri A. and von Seggern, Heinz (2012):
Polarization switching dynamics by inhomogeneous field mechanism in ferroelectric polymers.
45, In: Journal of Physics D: Applied Physics, (16), IOP Publishing, p. 165301, ISSN 0022-3727, [Online-Edition: http://dx.doi.org/10.1088/0022-3727/45/16/165301],
[Article]

Abstract

The understanding of polarization switching dynamics of ferroelectrics is of great importance for practical applications and has been steadily advanced for ferroelectric ceramics and polymers for more than half a century. The temporal behaviour of polarization reversal in ferroelectric copolymers such as P(VDF-TrFE) cannot be satisfactorily explained by simple models such as the classical Kolmogorov–Avrami–Ishibashi nucleation and growth theory. In this paper the inhomogeneous field mechanism (IFM) model recently proposed for PZT ceramics has been applied to polymer ferroelectrics for the first time. The model is based on the assumption that the switching volume is divided into many spatial regions with independent dynamics, only determined by the local electric field. The local field values are randomly distributed over the ensemble of regions due to intrinsic inhomogeneities of the material. Therefore an inhomogeneous switching behaviour is induced by the varying local fields of each region. The statistical distribution of local field values can be directly extracted from the experimental data. The model satisfactorily describes virgin P(VDF-TrFE) samples over a broad time-field domain covering eight orders of magnitude of poling time and electric field values from 30–150 kV mm −1. In the same way we can conclude that the IFM model is adaptive to both ferroelectric ceramics and semi-crystalline polymers.

Item Type: Article
Erschienen: 2012
Creators: Schütrumpf, Jörg and Zhukov, Sergey and Genenko, Yuri A. and von Seggern, Heinz
Title: Polarization switching dynamics by inhomogeneous field mechanism in ferroelectric polymers
Language: English
Abstract:

The understanding of polarization switching dynamics of ferroelectrics is of great importance for practical applications and has been steadily advanced for ferroelectric ceramics and polymers for more than half a century. The temporal behaviour of polarization reversal in ferroelectric copolymers such as P(VDF-TrFE) cannot be satisfactorily explained by simple models such as the classical Kolmogorov–Avrami–Ishibashi nucleation and growth theory. In this paper the inhomogeneous field mechanism (IFM) model recently proposed for PZT ceramics has been applied to polymer ferroelectrics for the first time. The model is based on the assumption that the switching volume is divided into many spatial regions with independent dynamics, only determined by the local electric field. The local field values are randomly distributed over the ensemble of regions due to intrinsic inhomogeneities of the material. Therefore an inhomogeneous switching behaviour is induced by the varying local fields of each region. The statistical distribution of local field values can be directly extracted from the experimental data. The model satisfactorily describes virgin P(VDF-TrFE) samples over a broad time-field domain covering eight orders of magnitude of poling time and electric field values from 30–150 kV mm −1. In the same way we can conclude that the IFM model is adaptive to both ferroelectric ceramics and semi-crystalline polymers.

Journal or Publication Title: Journal of Physics D: Applied Physics
Volume: 45
Number: 16
Publisher: IOP Publishing
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 > Electronic Materials
DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
Zentrale Einrichtungen
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
Date Deposited: 15 Nov 2013 09:41
Official URL: http://dx.doi.org/10.1088/0022-3727/45/16/165301
Additional Information:

SFB 595 Cooperation B7, C5

Identification Number: doi:10.1088/0022-3727/45/16/165301
Funders: The authors JS and SZ acknowledge the financial support by Deutsche Forschungsgemeinschaft (DFG) through the Research Training Group 1037 TICMO (Tuneable Integrated Components in Microwave Technology and Optics) and the SFB 595, respectively.
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