The electronic structure of Mg doped Fe3O4 thin films were studied by X-ray absorption near edge structure (XANES). Measurements were performed near Mg, O and Fe K-edges. Mg K-edge spectra show a gradual evolution from a much broader three-feature structure into characteristic MgO spectrum as x varies from 0.1 to 1. The O K-edge XANES spectra indicate that the Fe 3d–O 2p hybridized states decrease as Mg concentration increases. Results of Fe K-edge XANES reveal the Mg was doped preferably into B-site more. All spectra indicate the change of crystal and electronic structure from spinel to rocksalt, start at x > 0.5.
Journal of alloys and compounds 442(1-2), pp.259-261