Synthesis of BaTiO3/LaNiO3 and PbTiO3/LaNiO3 Multilayer Thin Films by Spray Combustion Flame Technique

Abstract

In an attempt to utilize LaNiO3 thin film as a bottom electrode for ferroelectric BaTiO3 and PbTiO3 thin films, PbTiO3/LaNiO3 and BaTiO3/LaNiO3 multilayer thin films were prepared on MgO(100) by spraying an ultrasonically atomized nitrate solution into a combustion flame (spray combustion flame technique). Highly oriented BaTiO3(100)/LaNiO3(100) and PbTiO3(001)/LaNiO3(100) multilayer thin films were obtained on MgO(100). BaTiO3 film was pseudocubic while PbTiO3 film was tetragonal. Curie temperature measurement of the PbTiO3 film suggested that the films were free from contamination when LaNiO3 was used as a bottom electrode.