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Equilibrium Domain Structures of Epitaxial Perovskite Ferroelectric Films

Published online by Cambridge University Press:  15 February 2011

S. Pamir Alpay  and
Alexander L. Roytburd
S. Pamir Alpay
Affiliation:
Department of Materials and Nuclear Engineering, University of Maryland, College Park, MD, 20742–2115.
Alexander L. Roytburd
Affiliation:
Department of Materials and Nuclear Engineering, University of Maryland, College Park, MD, 20742–2115.
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Abstract

Possible equilibrium domain structures due to elastic interactions between the film and the substrate as a result of a cubic-tetragonal transformation observed in epitaxial perovskite ferroelectric films are analyzed. The formation of both two- and three-domain states is taken into account. A stability map which shows domain stability regions as a function of temperature is developed in coordinates of misfit strain and tetragonality of the lattice of the ferroelectric phase. Misfit dislocation generation at the growth temperature is found to have a profound effect on domain selection. As an example a PbTiO3(001) film grown on a MgO(001) substrate is considered and theoretical findings are compared with experimental results in the literature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 474: Symposium L – Epitaxial Oxide Thin Films III , 1997 , 407
Copyright
Copyright © Materials Research Society 1997

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References

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