Thin films of La0.7Sr0.3MnO3 with thickness of 3 00 nm have been grown by computer-controlled laser molecular beam epitaxy on SrTiO3 (001) substrate and were characterized by transmission electron microscopy. It is seen that the films are epitaxially grown on SrTiO3 substrate. Microstructures in the films are clarified by oriented domains of the rhombohedral variant derived from the perovskite structure. Relationships between each domain and the SrTiO3 substrate are discussed.
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