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Depolarization of multidomain ferroelectric materials
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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6560217/ https://www.ncbi.nlm.nih.gov/pubmed/31186422 http://dx.doi.org/10.1038/s41467-019-10530-4 |
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author | Zhao, Dong Lenz, Thomas Gelinck, Gerwin H. Groen, Pim Damjanovic, Dragan de Leeuw, Dago M. Katsouras, Ilias |
author_facet | Zhao, Dong Lenz, Thomas Gelinck, Gerwin H. Groen, Pim Damjanovic, Dragan de Leeuw, Dago M. Katsouras, Ilias |
author_sort | Zhao, Dong |
collection | PubMed |
description | 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, P(r)/ε(0)ε(ferro)E(c). Among different multidomain ferroelectric materials the values of coercive field, E(c), dielectric constant, ε(ferro), and remanent polarization, P(r), vary by orders of magnitude; the value for P(r)/ε(0)ε(ferro)E(c) 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. |
format | Online Article Text |
id | pubmed-6560217 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-65602172019-06-21 Depolarization of multidomain ferroelectric materials Zhao, Dong Lenz, Thomas Gelinck, Gerwin H. Groen, Pim Damjanovic, Dragan de Leeuw, Dago M. Katsouras, Ilias Nat Commun Article 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, P(r)/ε(0)ε(ferro)E(c). Among different multidomain ferroelectric materials the values of coercive field, E(c), dielectric constant, ε(ferro), and remanent polarization, P(r), vary by orders of magnitude; the value for P(r)/ε(0)ε(ferro)E(c) 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. Nature Publishing Group UK 2019-06-11 /pmc/articles/PMC6560217/ /pubmed/31186422 http://dx.doi.org/10.1038/s41467-019-10530-4 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Zhao, Dong Lenz, Thomas Gelinck, Gerwin H. Groen, Pim Damjanovic, Dragan de Leeuw, Dago M. Katsouras, Ilias Depolarization of multidomain ferroelectric materials |
title | Depolarization of multidomain ferroelectric materials |
title_full | Depolarization of multidomain ferroelectric materials |
title_fullStr | Depolarization of multidomain ferroelectric materials |
title_full_unstemmed | Depolarization of multidomain ferroelectric materials |
title_short | Depolarization of multidomain ferroelectric materials |
title_sort | depolarization of multidomain ferroelectric materials |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6560217/ https://www.ncbi.nlm.nih.gov/pubmed/31186422 http://dx.doi.org/10.1038/s41467-019-10530-4 |
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