Nominal valence states of Ti ions in FeTiO3 are generally considered to be Ti4+. However, due to the close energy levels between Fe2+ and Ti4+ states, there are some possibilities of intervalence charge transfer from Fe2+ to Ti4+. In order to clarify the real electronic structures of Ti ions in FeTiO3, we performed resonant photoemission spectroscopy (RPES) and X-ray magnetic circular dichroism (XMCD) across the Ti 2p→3d excitation. The RPES spectra clearly indicated the partial density of states derived from the Ti 3d states on the valence band. The Ti 3d states appearing at the top of the valence bands were overlapped with the Fe 3d states. Moreover, the XMCD spectra at Ti L2,3 edges suggested large magnetic polarization of Ti ions in FeTiO3 in spite of nonmagnetic natures of Ti4+ ions in common sense. The Ti ions in FeTiO3 seemed to have some 3d electron densities caused by the electron transfer from the Fe 3d t2g↓ states.
- Electronic structure
- Ilmenite-hematite solid solution
- Magnetic circular dichroism
- Resonance photoemission spectroscopy
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics