Structure of interfaces in layered ferroelectrics of first and/or second order transition
Document Type
Article
Publication Date
1-1-2004
Abstract
We studied the structure of interfaces in layered ferroelectrics comprising two different ferroelectric materials with first and/or second order transitions. The layered structure is described using the Landau-Ginzburg theory by including a bilinear coupling at the interface between the two neighboring layers. The interfacial coupling leads to the variation of polarization across the interface from one layer to another. An abrupt or continuous change of polarization across the interface is found to depend on the strength of coupling. For a layered structure having a layer in paraelectric phase, an interface-ordered state is predicted (in the paraelectric layer) as a manifestation of interfacial coupling. The Tilley-Zeks model is compared with the present approach to discuss the relationship between the bilinear coupling parameter and the extrapolation lengths.
Keywords
Ferroelectricity, Interface Structure, Phase Transition, Layered Ferroelectrics
Divisions
PHYSICS
Publication Title
Journal of the Physical Society of Japan
Volume
73
Issue
11
Additional Information
Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA