Asymmetrical twin boundaries and highly dense antiphase domains were identified by means of transmission electron microscopy in a perovskite-based BaNb0.3Ti0.7O3 thin film grown by laser molecular beam epitaxy on a SrTiO3 (001) substrate. Themicrostructural characteristics of the BaNb0.3Ti0.7O3 film were clarified in terms of lamellar {111} twins and antiphase domains, the domain boundaries of which were ½<110> stacking faults. It was proposed that the intersections of (111) twinning with the antiphase domain boundaries result in the asymmetrical twin boundaries.

Asymmetrical Twin Boundaries and Highly Dense Antiphase Domains in BaNb0.3Ti0.7O3 Thin Films. S.J.Zheng, X.L.Ma: Philosophical Magazine, 2007, 87[28], 4421-31