Electrostatic coupling and interface intermixing in ferroelectric superlattices

Chew, Khian Hooi and Iwata, M. and Lim, K.G. and Ong, L.H. (2012) Electrostatic coupling and interface intermixing in ferroelectric superlattices. Epl, 99 (4). ISSN 0295-5075

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Abstract

A thermodynamic model is developed to study electrostatic coupling and interface intermixing in superlattices comprising alternate layers of ferroelectrics and paraelectrics. Interface intermixing leads to inhomogeneous internal electric field and polarization in superlattices. The spatial distribution of polarization extends into the layer over a distance governed by its correlation length. Periodic modulation of the internal electric field and polarization in superlattices are correlated. Interface intermixing enhances the depolarization field of superlattices; however, it has a negligible effect on polarization and transition temperature. The internal electric field, originating from the electrostatic coupling between ferroelectric layers, plays a dominant role in determining the properties of superlattices. Copyright (C) EPLA, 2012

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Landau-ginzburg theory, Artificial superlattices, Thin-films, Phase, Deposition, Transition, Bilayers
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 29 Jul 2013 01:59
Last Modified: 27 Aug 2019 07:37
URI: http://eprints.um.edu.my/id/eprint/8238

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