Interface microstructures of BaTiO3/LaA1O(3) grown by metalorganic chemical vapor deposition (MOCVD) are studied using high-resolution transmission electron microscopy (HRTEM). Interface dislocations in BaTiO3/LaAlO3 have been shown to be directly linked up with the 90 degrees domain boundaries in BaTiO3. This association is a result of strain relief due to a phase transformation when cooled down from the growth temperature. The Burgers vector of the interface dislocations is [010]. (C) 1996 American Institute of Physics.
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