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05- International Journal of Thin Film Science and Technology
An International Journal
               
 
 
 
 
 
 
 
 
 
 
 
 

Content
 

Volumes > Vol. 8 > No. 3

 
   

Temperature Dependence on Optical Properties of Sr Doped BaTiO3 Thin films by Vacuum Evaporation Method

PP: 147-156
doi:10.18576/ijtfst/080307
Author(s)
R. Sengodan, R. Kannan, R. Balamurugan, B. Chandra Shekar,
Abstract
Strontium doped Barium titanate nano powders were prepared by the wet chemical method using the starting materials barium chloride (BaCl2), titanium dioxide (TiO2), strontium carbonate (SrCO3) and oxalic acid with high calcinations temperatures. The prepared nano powders were thermally grown onto well cleaned glass substrates under the vacuum of 10-5 torr, using 12A4 Hind Hivac coating unit. The X-ray diffraction patterns revealed that Sr doped BaTiO3 nanoparticles possess tetragonal structure and the deposited films were polycrystalline in nature. Absorption coefficient, extinction coefficient, optical band gap and refractive index of films were estimated from optical transmittance spectrum. The extinction coefficient and refractive index of the BaTiO3 thin films increases with increasing annealing temperature. The optical band gap energy value decreases with increase of annealing temperature.

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