PREPARATION OF PBTIO3 THIN-FILMS BY ION-ASSISTED AND PHOTOASSISTED EVAPORATION

PbTiO3 films were grown on MgO substrates by the recently developed ion- and photoassisted evaporation technique, Pb and Ti were evaporated from electron-beam-heated metal sources under the irradiation of an oxygen ion beam and excimer laser beam for the ion activation and for the photoactivation, respectively. Crystal structure of the films was significantly affected by ion energy, ion current, laser pulse energy and repetition rate. The substrate temperature required for in-situ preparation of perovskite PbTiO3 could be lowered to 450-degrees-C by ion-assisted evaporation and to room temperature by ion- and photoassisted evaporation.