Abstract
Thickness dependence of ferroelectric and structural properties of BaTiO3 thin films was investigated. BaTiO3 thin films were prepared by rf magnetron sputtering on polycrystalline Pt substrates at 700°C. Film thickness range was 2,100-20,000 Å. Room temperature permittivity, and D-E hysteresis loops were measured as a function of the film thickness. It has been found that these properties had the strong dependence on film thickness, which has mainly due to grain sizes of BaTiO3 thin films. The variation in permittivity according to grain size was discussed in terms of crystallinity, film stress, and recrystallization process.
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