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Ferroelectric thin films of BaTiO3 and BaTiO3∕SrRuO3 epitaxial heterostructures on different single-crystalline substrates were fabricated by pulsed laser deposition. The BaTiO3 films of 100–400nm thickness show high structural perfection and c-axis-oriented growth. For the electrical characterization of the BaTiO3 in a thin-film capacitor structure, Pt top electrodes were deposited by e-beam evaporation. The results are compared to the current experimental and theoretical models. Special consideration is given to the model of charge injection from the electrodes.
Trithaveesak et al. (Wed,) studied this question.