Effects of the substrate on properties of PTO thin film

The lead titanate (PbTiO3: PTO) films grown by PE-CVD had (0 0 1) and (1 1 1) orientations on the substrates of Pt(1 0 0)/MgO(1 0 0) and Pt(1 1 1)/MgO(1 1 1) while the PTO film had (1 0 0) orientation on the Pt(1 1 1)/MgO(1 0 0) substrate. The PTO thin film with (0 0 1) orientation had the best flatness. The PTO film on the Pt(1 0 0)/MgO(1 0 0) substrate having the crystallographic orientation corresponding to the polarization direction showed a ferroelectrical hystersis loop.