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Examines the fabrication of pyroelectric Ba[sub 0.8]Sr[sub 0.2]TiO[sub 3] thin films with a sol-gel process. Relationship between dielectric constants and temperature; Decrease of the coercive field; Use of thin films in uncooled infrared detectors and thermal imaging applications.

A unique configuration of PbZr0.4Ti0.6O3 multilayer stack was designed and grown on F-doped tin oxide thin film by spin casting and annealing process. The multilayer system exhibits a broad reflection band with peak reflectivity over 95% and band width no < 40 nm, a dielectric constant of 520 and dielectric tunability of ~49% at 1 MHz, a remanent polarization of 46.8 μC/cm2, and a polarization loss of < 5% after 109 polarization switching cycles, rendering excellent performance as 1D photonic crystals and as ferroelectric and dielectric media. This material structure may find application in photonic band-gap engineering, microwave tunable devices, and integrated optoelectronics. [ABSTRACT FROM AUTHOR]

Examines the effects of individual layer thickness on the microstructure and electrical properties of sol-gel derived barium strontium titanate thin films. Measurement of thickness layer growth resulting in columnar grains; Influence of the nature of substrates on microstructure and ferroelectricity; Characteristics of barium strontium titanate.