Microwave dielectric properties and optical transmittance of SrTiO3/ZnTiO3 heterolayer thin films fabricated by sol-gel processing

SrTiO3/ZnTiO3 heterolayered thin films were fabricated by spin coating Sr-Ti and Zn-Ti sol-gel precursors on fused silica substrate. The SrTiO3 and ZnTiO3 were coated alternatively to form ABAB heterolayered thin films. The thickness of individual layers was tailored by controlling the coating layers. The structure characterization of the thin films showed independent structure of each layer while the microwave dielectric properties and optical band gaps can be tuned by changing the layer configuration. The effects of the layer configuration on the dielectric and optical properties were studied.