Pb1−xCaxTiO3 thin films prepared by laser ablation of ceramic targets

Pb1−xCaxTiO3 thin films with thickness in the 200–1000 nm range have been prepared by pulsed laser deposition on Pt/TiO2/SiO2/(100)Si substrates. 10% weight PbO-rich ceramic targets have been ablated with a KrF excimer laser. It has been found that the Ca concentration of the films remains close to its concentration in the target (x = 0.24). Optimized crystalline orientation is obtained using non sintered targets, on the other hand optimized tetragonality has been found in 600 nm thick films. The films show an asymmetric ferroelectric behavior.