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Polarization and dielectric behaviors of antiferroelectric-ferroelectric superlattices

We propose a thermodynamic model to investigate the polarization and dielectric behaviors of antiferroelectric-ferroelectric (AFE-FE) superlattices by taking into account the electrostatic coupling effect. Coupling at the interface between the AFE and FE layers is mediated by local polarizations, wh...

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Main Authors: Lum, Chia Yuee, Lim, Kok-Geng, Chew, Khian-Hooi
Format: Article
Published: Taylor & Francis Ltd 2021
Subjects:
QC Physics
Online Access:http://eprints.um.edu.my/27121/
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spelling my.um.eprints.271212022-05-24T02:09:46Z http://eprints.um.edu.my/27121/ Polarization and dielectric behaviors of antiferroelectric-ferroelectric superlattices Lum, Chia Yuee Lim, Kok-Geng Chew, Khian-Hooi QC Physics We propose a thermodynamic model to investigate the polarization and dielectric behaviors of antiferroelectric-ferroelectric (AFE-FE) superlattices by taking into account the electrostatic coupling effect. Coupling at the interface between the AFE and FE layers is mediated by local polarizations, which favors an FE ordering. The Kittel's model of antiferroelectricity is employed to describe the free energy of AFE layer, whereas the free energy of the FE layer is described by the Landau-Ginzburg theory. Polarization and dielectric susceptibility are calculated as a function of temperature. Our results show that when interface coupling is increased, AFE ordering is enhanced in the FE layer while FE ordering is favored in the AFE layer and superlattice. Also, abrupt changes of dielectric susceptibilities are observed during FE-FI phase transition. Taylor & Francis Ltd 2021-12-29 Article PeerReviewed Lum, Chia Yuee and Lim, Kok-Geng and Chew, Khian-Hooi (2021) Polarization and dielectric behaviors of antiferroelectric-ferroelectric superlattices. Integrated Ferroelectrics, 223 (1). pp. 228-234. ISSN 1058-4587, DOI https://doi.org/10.1080/10584587.2021.1964301 <https://doi.org/10.1080/10584587.2021.1964301>. 10.1080/10584587.2021.1964301
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QC Physics
spellingShingle QC Physics
Lum, Chia Yuee
Lim, Kok-Geng
Chew, Khian-Hooi
Polarization and dielectric behaviors of antiferroelectric-ferroelectric superlattices
description We propose a thermodynamic model to investigate the polarization and dielectric behaviors of antiferroelectric-ferroelectric (AFE-FE) superlattices by taking into account the electrostatic coupling effect. Coupling at the interface between the AFE and FE layers is mediated by local polarizations, which favors an FE ordering. The Kittel's model of antiferroelectricity is employed to describe the free energy of AFE layer, whereas the free energy of the FE layer is described by the Landau-Ginzburg theory. Polarization and dielectric susceptibility are calculated as a function of temperature. Our results show that when interface coupling is increased, AFE ordering is enhanced in the FE layer while FE ordering is favored in the AFE layer and superlattice. Also, abrupt changes of dielectric susceptibilities are observed during FE-FI phase transition.
format Article
author Lum, Chia Yuee
Lim, Kok-Geng
Chew, Khian-Hooi
author_facet Lum, Chia Yuee
Lim, Kok-Geng
Chew, Khian-Hooi
author_sort Lum, Chia Yuee
title Polarization and dielectric behaviors of antiferroelectric-ferroelectric superlattices
title_short Polarization and dielectric behaviors of antiferroelectric-ferroelectric superlattices
title_full Polarization and dielectric behaviors of antiferroelectric-ferroelectric superlattices
title_fullStr Polarization and dielectric behaviors of antiferroelectric-ferroelectric superlattices
title_full_unstemmed Polarization and dielectric behaviors of antiferroelectric-ferroelectric superlattices
title_sort polarization and dielectric behaviors of antiferroelectric-ferroelectric superlattices
publisher Taylor & Francis Ltd
publishDate 2021
url http://eprints.um.edu.my/27121/
_version_ 1735409502052679680
score 13.211869

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