Abstract
The electronic structures of multiferroic oxides of Ba1−x Bi x Ti0.9Fe0.1O3 (0 ≤ x ≤ 0.12) have been investigated by employing photoemission spectroscopy and soft X-ray absorption spectroscopy (XAS). The measured Fe and Ti 2p XAS spectra show that Ti ions are in the Ti4+ states for all x and that Fe ions are Fe2+-Fe3+ mixed-valent for x > 0. The valence states of Fe ions are found to be nearly trivalent for x=0 and decrease with increasing x from being nearly trivalent (v(Fe) ~ 3) for x = 0 to v(Fe) ~ 2.6 for x = 0.12. The valence states of both Ti and Ba ions do not change for all x ≤ 0.12. Based on the obtained valence states of Fe ions, the electronic and the magnetic properties of Ba1−x Bi x Ti0.9Fe0.1O3 are explored.
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Kim, H.W., Kim, D.H., Lee, E. et al. Soft X-ray absorption spectroscopy study of multiferroic Bi-substituted Ba1−x Bi x Ti0.9Fe0.1O3 . Journal of the Korean Physical Society 69, 361–364 (2016). https://doi.org/10.3938/jkps.69.361
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DOI: https://doi.org/10.3938/jkps.69.361