Fig. 2: X-ray absorption and photoelectron spectra of Fe-BNBT thin films.
From: Flexoelectricity-driven giant polarization in (Bi, Na)TiO3-based ferroelectric thin films
The a Fe K-edge, b O K-edge, and c Ti L-edge XAS spectra of Fe-BNBT thin films acquired in total fluorescence yield (TFY) mode. The inset in (a) refers to the full spectra of Fe K-edge. The inset in (c) is the result of peak fitting of the L3 eg peak of Fe-BNBT thin films. The configuration interaction cluster model calculation is a computational technique used in quantum chemistry and solid-state physics to study the electronic structure of atomic systems, which is particularly valuable in systems with strong electron correlation. d XPS spectra of the O 1s electronic level for Fe-BNBT thin films. Blue, green, and purple peak is ascribed to the lattice oxygen, lattice oxygen connected with the lower valence cation after vacancy creation, and the adsorbed surface water and/or hydroxyl molecules, respectively.
