Title: Phenomenological analysis of domain width in rhombohedral BiFeO(3) films
Authors: Huang, C. W.
Chen, Lang
Wang, J.
He, Q.
Yang, S. Y.
Chu, Y. H.
Ramesh, R.
Department of Materials Science and Engineering
Issue Date: 1-Oct-2009
Abstract: The experimental domain size scaling law in epitaxial BiFeO(3) films shows a different behavior from predictions of the conventional elastic domains: the (101)-type 71 degrees domains are much wider than that of (100)-type 109 degrees despite the larger domain-wall energy in (100) boundary. A phenomenological analysis for rhombohedral BiFeO(3) film is proposed, and it reveals that both the depolarizing energy and the elastic energy are indispensable for the equilibrium domain structures. With the increase in the asymmetrical electrostatic boundary on the film surfaces, the dominant domain scaling mechanism changes from electrostatic-dependent domain structure to elastic-dependent one, which is consistent with the experimental data. The present results highlight the general role of depolarizing field in rhombohedral domain structures.
URI: http://dx.doi.org/10.1103/PhysRevB.80.140101
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.80.140101
Volume: 80
Issue: 14
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