A type of dissociated misfit dislocation in epitaxial Ba0.3Sr0.7TiO3 thin films on (001) LaAlO3 substrates was studied by high-resolution transmission electron microscopy. The dislocation had a Burgers vector [210] and was dissociated into four partial dislocations with Burgers vectors of type ½<110>. All partials could relieve the localized misfit strain and they were interacted with three ½<110> stacking faults lying on (001). The partials were generated during island nucleation and mosaic growth of the BSTO film, while a small amount of excess TiO2 during film deposition favored the formation of the ½<110> stacking faults.

Type of Dissociated Misfit Dislocation in Perovskite Films on LaAlO3. C.J.Lu: Applied Physics Letters, 2004, 85[14], 2768-70