Raman scattering study of microcrystals of perovskite titanates

Microcrystals of several perovskite titanates (ATiO(3), A:Pb, Mn, Ni, Co, Mg) have been synthesized by the corrosion product method. The products were characterized by XRD, SEM, and Micro-Raman scattering. The average size of the microcrystals is estimated to about 2 m by the scanning electron microscope. Micro-Raman scattering spectra show the typical line shapes corresponding to the crystal structures of ATiO(3). In the trigonal MgTiO3, the intensities of the several Raman modes take the maximum value at 50 degrees C as temperature increase from room temperature. It is indicated that the peaks are caused by the impurities rather than the structural change.