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This paper reports on the effect of phase formation on the dielectric behaviour of nanostructured calcium copper titanate (CaCu 3 Ti 4 O 12 ) thin film and powder prepared by using the sol–gel method. X-ray diffraction peaks were indexed as a cubic phase belonging to the Im3 space group for both film and powder. The monophase with a highly crystalline nature was obtained at lower temperature for thin film compared with powder. Micrographs of CaCu 3 Ti 4 O 12  thin film and nanopowder confirmed the presence of nano-dimensional particles. The functional groups and optical properties of both film and powder were characterized by using the Fourier transform infrared spectrum and the photoluminescence spectrum. The CaCu 3 Ti 4 O 12  thin film showed higher dielectric permittivity than powder, which strongly suggests that nanostructured thin film is a more efficient material than powder for microelectronic devices.

A comparative study of nanostructured calcium copper titanate thin film and powder and their properties