Orientation Preferred Structures in BaTiO(3) Thin Films on Ni Substrates

We report the fabrication of the orientation preferred structures in BaTiO 3 thin films on Ni substrates using pulsed laser deposition. Transmission electron microscopy studies showed that the films consist of crystalline structures of tetragonal BaTiO 3. More than 60% of BaTiO 3 grains in the films exhibit nearly the same crystallographic orientation with their a-axis lying in the film plane and the (011) direction parallel to the growth direction. Such orientation preferred structures were grown on a Ni nanocrystalline buffer layer. This result demonstrated the possibility of approximating an oriented single crystalline ceramic oxide structures on metallic substrates.