Abstract
Structural, electronic and optical properties of BaTiO3 (BTO), CoFe2O4 (CFO) and their nanocomposites are presented. The XRD spectra of composites exhibited the superposed peak patterns of individual compounds with a consistent shift from BTO to CFO phase with the increase in CFO proportion. The XPS analysis revealed a lower concentration of Oxygen vacancies in the composite samples as compared to that in pure CFO. This finding is also confirmed by the consistent transformation of Co from +2 state in CFO to +3 state in the composite samples. The UV–Vis spectroscopy revealed that optical absorption of BTO is limited to the UV regime, however, CFO exhibited the absorption in visible and infrared (IR) region. However, after the formation of BTO-CFO composite, the optical absorption was broadened from UV to IR regions. The magnitude of absorption was further enhanced by increasing the CFO content in the composites.
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