Depolarization of multidomain ferroelectric materials.
- Zhao D Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany. d.zhao@fkf.mpg.de.
- Lenz T Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.
- Gelinck GH Holst Centre, High Tech Campus 31, 5656 AE, Eindhoven, The Netherlands.
- Groen P Holst Centre, High Tech Campus 31, 5656 AE, Eindhoven, The Netherlands.
- Damjanovic D Group for Ferroelectrics and Functional Oxides, Swiss Federal Institute of Technology-EPFL, 1015, Lausanne, Switzerland.
- de Leeuw DM Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.
- Katsouras I Holst Centre, High Tech Campus 31, 5656 AE, Eindhoven, The Netherlands. ilias.katsouras@tno.nl.
- 2019-06-13
Published in:
- Nature communications. - 2019
English
Depolarization in ferroelectric materials has been studied since the 1970s, albeit quasi-statically. The dynamics are described by the empirical Merz law, which gives the polarization switching time as a function of electric field, normalized to the so-called activation field. The Merz law has been used for decades; its origin as domain-wall depinning has recently been corroborated by molecular dynamics simulations. Here we experimentally investigate domain-wall depinning by measuring the dynamics of depolarization. We find that the boundary between thermodynamically stable and depolarizing regimes can be described by a single constant, Pr/ε0εferroEc. Among different multidomain ferroelectric materials the values of coercive field, Ec, dielectric constant, εferro, and remanent polarization, Pr, vary by orders of magnitude; the value for Pr/ε0εferroEc however is comparable, about 15. Using this extracted universal value, we show that the depolarization field is similar to the activation field, which corresponds to the transition from creep to domain-wall flow.
- Language
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- English
- Open access status
- gold
- Identifiers
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- DOI 10.1038/s41467-019-10530-4
- PMID 31186422
- Persistent URL
- https://sonar.ch/global/documents/69547
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