The interface microstructures of films which had been grown by means of metalorganic chemical vapor deposition, were studied by using high-resolution transmission electron microscopy. The interface dislocations were shown to be directly linked to 90 domain boundaries in BaTiO3. This association was attributed to strain relief, due to a phase transformation, when cooled from the growth temperature. The Burgers vector of the interface dislocations was <010>.

Z.R.Dai, Z.L.Wang, X.F.Duan, J.Zhang: Applied Physics Letters, 1996, 68[22], 3093-5