The thin film composite of Claim 3, wherein the dielectric is PbaLbZrxTiyOz, wherein L is a lanthanide metal, x and y independently range between about 0.35 to about 0.65, z is from about 2.5 to about 5.0, a is from about 0.95 to 1.25 and b is from about 0.02 to about 0.10. 6.