Influence of dielectric stiffness, interface, and layer thickness on hysteresis loops of ferroelectric superlattices

Chew, Khian Hooi and Iwata, M. and Ong, L.H. (2011) Influence of dielectric stiffness, interface, and layer thickness on hysteresis loops of ferroelectric superlattices. Journal of Applied Physics, 110 (5). ISSN 0021-8979, DOI https://doi.org/10.1063/1.3630016.

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Abstract

We examined the influence of dielectric stiffness, interface, and layer thickness on the hysteresis loops, including the remanent polarization and coercive field of a superlattice comprising alternate layers of ferroelectric and dielectric, using the Landau-Ginzburg theory. An interface energy term is introduced in the free energy functional to describe the formation of interface "dead" layers that are mutually coupled through polarization (or induced-polarization). Our studies reveal that the hysteresis loop is strongly dependent on the stiffness of the dielectric layer, the strength of the interface coupling and layer thickness. The intrinsic coupling at the interface between two neighboring layers reduces the coercive field, though the corresponding remanent polarization is significantly enhanced by a soft dielectric layer. (C) 2011 American Institute of Physics. [doi:10.1063/1.3630016]

Item Type:	Article
Funders:	UNSPECIFIED
Additional Information:	Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords:	Lattice model, Thin-films, Phase-transitions, Landau-theory, Polarization reversals, Heterostructures, Enhancement, Simulations, Nanoscale, Multilayers
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Department of Physics
Depositing User:	Miss Malisa Diana
Date Deposited:	29 Jul 2013 02:13
Last Modified:	27 Aug 2019 07:39
URI:	http://eprints.um.edu.my/id/eprint/8233

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