Investigation on properties of Pb_(1-x) La_x TiO_3 thin films fabricated by sol-gel method

The Pb 1- x La x TiO 3 (PLT) thin films were fabricated by sol gel spin on process onto Si substrates. Effect of La doapant on dielectric and ferroelectric properties have been investigated. From the analysis, we observed the coercive field and remnant polarization decreased with increasing La concentration; and the dielectric constant and the loss tangent increased according to the increase of La concentration. The film annealed at 600℃ for 1h showed perovskite phase, and had the typical hysteresis loops.