Electronic structure studies of Mg0.95Mn0.05Fe2−2xTi2xO4 (0⩽x⩽0.8)

The electronic structure of Mg0.95Mn0.05Fe2−2xTi2xO4 (0⩽x⩽0.8) compound is investigated using near edge X-ray absorption fine structure, (NEXAFS) spectroscopy measurements, carried out at O K, Fe and Ti L3,2-edges at room temperature. The O K-edge spectra indicate that the Fe 3d orbitals have been considerably modified and a new spectral feature start dominating in the pre-edge region at higher Ti doping. The Fe 2p NEXAFS spectra exhibit a mixed valent Fe2+/Fe3+ states apart from the conversion of Fe3+ to Fe2+ with the substitution of Ti ions. The Ti L3,2-edge spectra indicate that Ti ions remain unchanged at 4+ state. These variations in the host electronic structure due to Ti substitution are consistent with the dielectric and transport properties of the material.