Abstract

• We used spin coating to fabricate a Sr doped PbTiO3 thin film on n-Si subtract. By means of X-ray diffraction and scanning electron microscopy analyses, it was confirmed that tetragonal structure at an as-synthesized state. The variations of capacitance (C) with frequency at different temperatures were also observed. It was found that the capacitance was frequency dependent at all temperatures but almost independent in the high frequency range beyond 3 kHz. From the variation of dielectric loss (tanδ) with frequency it was seen that tanδ values increase rapidly with frequency and attains a minimum value. Reverse C-V characteristics exhibited a linear 1/C 2 versus V plot, from which a built-in potential of 0.71 V-0.85 V were deduced.