IR-spectroscopic characterization of A2BB′O6 perovskites

A large series of ternary oxides of composition A(2)BB'O-6 and belonging to the perovskite structural type have been prepared and their structures confirmed by X-ray powder diffractometry. Most of these materials present deviations and distortions regarding the ideal perovskite structure. The infrared spectra of all the materials were recorded and briefly discussed in relation to their structural peculiarities and by comparison with those of related oxides. The usefulness of these compounds as substrates for the deposition of high T-c superconducting films is commented. (C) 2003 Elsevier B.V. All rights reserved.