STUDY OF ELECTRICAL-PROPERTIES OF RAPID THERMALLY PROCESSED LEAD IRONNIOBATE FILMS SYNTHESIZED BY A SOL-GEL METHOD

Lead iron niobate thin films were synthesized using a modified sol gel method. Films processed at temperatures as low as 400 degrees C had a dielectric constant K approximate to 400. K of approximate to 1000 an d a low loss factor tan delta approximate to 0.02 were obtained for fi lms rapid thermally processed between 650-700 degrees C. Films process ed at approximate to 400 degrees C showed a more linear behavior and w ere able to endure higher electric fields up to 1.6 MV/cm. The remanen t polarization P-r and coercive field H-c for films processed at 650 d egrees C/1 s were 4.5 mu C/cm(2) and 40 kV/cm, respectively. Leakage c urrent densities of films increased with processing temperature and we re of the order of 4 and 10 nA/cm(2) for films multiply processed at 4 25 degrees C/30 s and 650 degrees C/1 s, respectively. (C) 1996 Americ an Institute of Physics.