Fabrication and structure studies of Co : BaTiO3 nano composite thin films

Co:BaTiO3 nano-composite thin films on single-crystal magnesia (100) were successfully fabricated by pulsed laser deposition. The morphology and microstructure of the thin films were investigated via atomic force microscope, x-ray diffractometer and Raman spectroscopy. The results show that the thin films consisted of a highly c-axis oriented tetragonal phase. The surfaces of the thin films were uniform, compact and of atomic smoothness (RMS = 0.15 nm). The co particles of monodisperse distribution, were found to be well dispersed in the matrix Co:BaTiO3. With increasing Co grain size, the intensities of Raman peaks were weakened and their width broadened.