The electronic conduction mechanism in barium strontium titanate thin films

In the literature, the Schottky emission equation is widely used to describ e the conduction mechanism in perovskite-type titanate thin films. Though t he equation provides a good fit to the leakage current data, the extracted values of the Richardson and dielectric constants are inconsistent with the ir experimental values. In this work, a modified Schottky equation is appli ed. This equation resolves the difficulties associated with the standard Sc hottky equation. Also, the electronic mobility in thin films of barium stro ntium titanate is reported. (C) 1998 American Institute of Physics. [S0003- 6951(98)00650-0].