Structural and optical properties of ferroelectric Bi4Ti3O12 thin films by sol-gel technique

Abstract

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.