SOLID-STATE SOLUTIONS OF TIO2-SNO2 AND SRTIO3-BATIO3

Thin films of TiO2-SnO2 and SrTiO3-BaTiO3 are deposited by rf sputteri ng. The crystallographic and optical properties near the band gap abso rption are investigated as a function of film composition. Systematic displacement of the fundamental absorption edge shows different behavi our for amorphous and polycrystalline samples. Results are discussed i n terms of the influence of the substitution on the local environment of Ti ion and Me-O distances. Application of XANES and EXAFS is propos ed for the studies of solid-state solutions.