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Barium strontium titanate ( Ba0.6Sr0.4TiO3) or BST thin films on quartz substrates have been prepared by using a modified sol-gel processing technique. The starting materials are barium 2-ethylhexanoate Ba[CH3( CH2)3CH(C2H5) CO2]2, strontium 2-ethylhexanoate Sr[CH3( CH2)3CH(C2H5) CO2]2and titanium (IV) isopropoxide Ti[CH3CH3CHO ]4. The precursors Ti[CH3CH3CHO ]4except were synthesized in the laboratory. Transparent and crack-free films were fabricated on quartz substrates by spin coating. The as-fired films were found to be amorphous, which crystallized to cubic phase after annealing at 550°C in air for 1 hr. In this paper, we report the structural and optical properties of BST thin films prepared by the modified sol-gel process.
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Singh et al. (2008) studied this question.
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