Calculations on switching characteristics of ferroelectric-paraelectric superlattices
Document Type
Article
Publication Date
1-1-2012
Abstract
We study the switching characteristics of a superlattice consisting of a periodic ferroelectric and paraelectric layer with interlayer coupling using the Landau - Khalatnikov equation. The inhomogeneity of polarization at the ferroelectric or paraelectric surface is described by the extrapolation length delta. The effects of various parameters such as the viscosity coefficient, layer thickness, interlayer coupling and temperature on the switching characteristics are investigated. Our study shows that the hysteresis loop and switching current versus applied field depend strongly on those parameters. Inter layer coupling increases the ferroelectricity of the superlattice, leading to a strong enhancement in polarization and coercive field. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Keywords
Interfaces, Ferroelectric properties, Polarization switching, Superlattices, Batio3/srtio3 superlattices, Dielectric-properties, Films
Divisions
PHYSICS
Publication Title
Ceramics International
Volume
38
Additional Information
Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA