Probing Oxygen Vacancies Using Raman and Fourier Transform Infrared Investigations on “B-Site” Chromium-Doped Strontium Titanate

Abstract

Pure and “B-site” doped strontium titanate (SrCrxTi1-xO3; x = 0.0 - 0.2) were prepared by solid-state ceramic route. The phase and crystallinity of the synthesized powders were studied using X-ray diffraction. These studies revealed that the prepared samples were single phase and possessed cubic structure. The chromium doping at "B-site" has been investigated using spectroscopic techniques such as Raman and Fourier transform infrared techniques. The effect of the doping on the oxygen vacancies has been investigated using these spectroscopic techniques. Additionally, the enhanced room temperature electrical conductivity has been discussed in support of the influence of doping generated defects on the charge carrier concentration.