Preparation and characterization of manganese doped lead titanate films by sol-gel techniques

In the present investigation, sol-gel method has been adopted to make manganese doped lead titanate (PT) films with perovskite structure by reacting liquid precursors to form a sol. The films were deposited on stainless steel substrate by multilayer spin coating using technique. The films were then annealed at temperatures close to 550/spl deg/C. The films were crack free and the ferroelectric behavior was established by studying their hysteresis loop measurements. Dielectric constant was found to be around 300 and coercive field was greater than 60 kv/cm for films with finer grain sizes. The films fired at 550/spl deg/C exhibited remanent polarization values close to 25 micro-coulomb/cm/sup 2/.