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Lead iron niobate (PbFe0.5Nb0.5O3 - PFN) thin films were synthesized by amodified sol-gel route, which offers the advantage of a rapid, simple andnon-toxic reaction method. Polycrystalline perovskite-structured PFN thin filmswithout pyrochlore phases were obtained on Pt/Ti/SiO2/Si substrates aftersintering by rapid thermal annealing at 650 {\deg}C. TEM and AFM imagesconfirmed the excellent quality of the sintered film, while EDS spectroscopyrevealed the presence of oxygen vacancies near the film/substrate interface.Electric measurements show good dielectric properties and ferroelectricbehavior, characterized by typical C-V curves and well-defined P-Eferroelectric loops at 1 kHz, with remanent polarization values of ~12 uC/cm2.The polarization, however, increases with decreasing frequency, indicating thepresence of leakage currents. I-V measurements show a significant increase inDC-conduction at relatively low fields (around 100 kV/cm). The films displayferromagnetic behavior at room temperature, with magnetic remanence around 30emu/cm3 and a coercive field of 1 kOe. These values are significantly higherthan those obtained for PFN powders fabricated by the same sol-gel route, aswell as the magnetization values reported in the literature for epitaxialfilms.

Sol-gel synthesis and multiferroic properties of pyrochlore-free Pb(Fe0.5Nb0.5)O3 thin films