Ferroelectric thin films of Bi4Ti3O12 were fabricated on several types of substrates, including quartz, steel plates, and indium-tin-oxide coated glass slides, by sol-gel technique. Crystalline, transparent, and crack-free films of 5000 Å thickness were fabricated by spinning and post-deposition annealing at a temperature of 550 °C. Ferroelectric properties were confirmed by P-E hysteresis loops. The dielectric constant and optical transmission were also measured.
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Joshi et al. (1991) studied this question.