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Strong intensity oscillations have been found in reflection high-energy electron diffraction during epitaxial growth of BaTiO₃, La₂{CuO}₄$, and ${YBa}₂Cu₃{O}_{7{{-}}x}$ with perovskite-type structures. The oscillation period corresponds to the height of the minimum unit of each oxide that satisfies the chemical composition and electrical neutrality. The data provide a basic understanding of the epitaxial growth process of ionic oxides.
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Terashima et al. (1990) studied this question.
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