A multi-layer tin film composite comprising a substrate, at least one crystalline dielectric layer and a metal oxide barrier layer interposed between the metallic substrate and the at least one crystalline dielectric layer, the at least one crystalline dielectric layer having the formula PbZrxTiyOz or PbLbZrxTiyOz wherein L is a lanthanide metal, b is from about 0.02 to about 0.10, x and y are ind