Ti-modified thin films of multiferroic 0.72Bi(Fe1-xTix)O-3-0.28PbTiO(3) (BFPT, x = 0 and 0.02) solid solution were prepared by pulsed laser deposition. The BFPT (x = 0 and 0.02) films possess a tetragonal structure with highly preferential (001) orientation. The effects of the ionic substitution on the Properties of BFPT (x = 0 and 0.02) films have been investigated. The leakage current of the BFPT (x = 0.02) thin film is significantly reduced, and the dielectric and ferroelectric properties greatly improved by the aliovalent ionic substitution of Ti4+ for Fe3+. The BFPT (x = 0.02) thin film exhibits a reasonably high remnant polarization P-r with 2P(r) up to go mu C/cm(2) at 312 kV/cm and a switchable polarization up to 92 mu C/cm(2) at 417 kV/cm. (C) 2009 Elsevier B.V. All rights reserved.