Abstract
Ba0.7Gd0.3TiO3 thin films have been fabricated on fused silica by sol-gel spin coating route and annealed at 900 degrees C to obtained crystallized films. The effects of number of deposited layers on the surface morphology and optical band gap have been studied using atomic force microscopy and ultraviolet-visible spectroscopy, respectively. The films surface analysed through amplitude roughness parameters which show that the grain size and surface roughness are increased as the number of deposited layers increased. The transmittance spectra disclosed the UV absorption property of the BGT thin films at around 350 nm. The estimated optical band gap from Tauc plot is achieved in the range of 4.091 - 4.193 eV and it is found to be reduced as the number of deposited layers increased.