Fig. 2: Valence-state characterization by XAS and HAXPES spectra.
From: Observation of novel charge ordering and spin reorientation in perovskite oxide PbFeO3
a XAS of Fe L2,3-edge of PbFeO3, and reference Fe2O3; b Pb L3-edge XANES of PbFeO3 (black circles) and PbNiO3 (blue curve) for comparison. The green curve in (b) shows the pre-edge peak 6s state of PbFeO3 after subtracting the background (dashed gray curve). c Pb-4f HAXPES results for PbTiO3, PbCrO3, PbFeO3, PbCoO3, and PbNiO3 at RT. Predominant of Pb4+ and Pb2+ are evident in the spectrum for PbFeO3. d Average Pb valence state calculated from area ratios of Pb2+ and Pb4+ components. PbTiO3, PbCrO3, and PbNiO3 are standard for Pb2+, Pb3+ (Pb2+0.5Pb4+0.5), and Pb4+, respectively.
