Effects of the sol-concentration on the structural and dielectric properties of Pb(0.3)Sr(0.7)TiO(3) thin films derived by the sol-gel method.
Pb(0.3)Sr(0.7)TiO(3)(PST) thin films were deposited on Pt coated Si(100) substrates by sol-gel techniques using different sol-concentrations. The structural and dielectric characteristics of lead strontium titanate (PST) thin films as a function of the sol concentration were investigated. PST thin films reveal a columnar texture through the thickness when the sol-concentration is lower than 0.30 M. PST thin films derived from 0.35 M sol show better dielectric characteristics with the dielectric constant, dielectric loss, tunability, and field of motion (FOM) (tunability/ dissipation) of 200, 0.01, 47% and 47, respectively. The temperature dependence of the dielectric constant, dielectric loss and tunability of PST thin films were investigated in the temperature range of -140 to 120 degrees C exhibiting a dielectric peak of about -45 degrees C.
Department of Material Science and Engineering, Shanghai University, Shanghai, 200072, P. R. China
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D
Zhou
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W
Wu
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D
Jin
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J
Cheng
Z
Z
Meng
D002516:Ceramics / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D008422:Materials Testing; D008567:Membranes, Artificial; D044367:Phase Transition
D008567:Membranes, Artificial