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

Abstract The electronic structure of Mg 0.95 Mn 0.05 Fe 2−2 x Ti 2 x O 4 (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 L 3,2 -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 Fe 2+ /Fe 3+ states apart from the conversion of Fe 3+ to Fe 2+ with the substitution of Ti ions. The Ti L 3,2 -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.