BiFeO 3 – BiCrO 3 nanocomposite films were formed by depositing sol-gel solutions on Pt/Ti/SiO2/Si(100) structures. It was found from x-ray diffraction analysis that the films annealed at 550 °C in air and O2 atmosphere formed by polycrystalline composites of BiFeO3 (BFO) and BiCrO3 (BCO) without any other impurity phase in films. The BFO–BCO composite films annealed in O2/air showed small grains approximately 120 nm and 80 nm in diameter, respectively, and these nanograins were effective in suppressing leakage current in the films. We observed for the first time the leakage current in the range of 10−6 A/cm2 at an applied field 600 kV/cm, which is more than four order of magnitude lower than BFO films at similar applied electric field. The low leakage current density in BFO–BCO films annealed in air/O2 atmosphere might be due to the low oxygen vacancies, domination of the Ohmic conduction and intergrain depletion in grain boundary limited conduction. The remanent polarizations as large as 30 μC/cm2 at an applied electric field of 1200 kV/cm were obtained in the films and the films showed much improved fatigue response up to 108 measured switching cycles.