Valence State of Mn-Doped BiFeO₃–BaTiO₃Ceramics Probed by Soft X-ray Absorption Spectroscopy

Abstract

The valence state of Mn-doped BiFeO3–BaTiO3 ceramics has been probed by soft X-ray absorption spectroscopy (XAS). Mn-doped BiFeO3–BaTiO3 has valence states of Fe3+ and Ti4+, although BiFeO3 and Mn-doped BiFeO3 have mixed valence states of Fe2+ and Fe3+. The Mn 2p-XAS peak of Mn-doped BiFeO3–BaTiO3 locates at a lower energy side than that of Mn-doped BiFeO3 that corresponds to the Mn3+ valence state. These findings may indicate that the Fe3+ valence state of Mn-doped BiFeO3–BaTiO3 is stabilized by charge transfer from the Mn 3d state to the Fe 3d state through the Ti 3d state in BaTiO3.