Growth and properties of PbTiO(sub 3)/PLT heterostructures

摘要

Ferroelectric superlattice structures composed of three-dimensionally epitaxial PbTiO(sub 3) and PLT thin films have been successfully grown on SrTiO(sub 3) substrates by metalorganic chemical vapor deposition. The modulation structures were confirmed by (theta)-2(theta) XRD, and the excellent in-plane orientational relationship between the superlattice film and the substrate by (100), (110), and (111)-pole figures. The (phi)-scans through the (110) and (111) reflections were used as additional evidence for three-dimensional epitaxy. The substrate dependence of the epitaxial orientation of PLT and PbTiO(sub 3) single-layered thin films was investigated. PbTiO(sub 3) thin films with very high crystalline perfection can be successfully grown on KTaO(sub 3) substrates.