EXPERIMENTAL AND THEORETICAL CHARACTERIZATION OF RHODIUM-DOPED BARIUM-TITANATE

We present the results of an experimental and theoretical investigatio n of the properties of rhodium-doped barium titanate (Rh:BaTiO3). In o ur theoretical analysis we derive an expression for the effective trap density in the three-valence state model, for the first time to our k nowledge. We apply this model of photorefraction to the three-valence states of rhodium in Rh:BaTiO3, together with additional iron centres, and using this theory and our experimental results we deduce the popu lation densities and some photorefractive parameters of Rh:BaTiO3. (C) 1997 Elsevier Science B.V.