Local electronic and atomic structures of the B-site ions in perovskite SrFe1−xMnxO3−δ were evaluated with X-ray absorption spectroscopy (XAS) at Mn, Fe K- and L-edges and O K-edge. The energy of LIII- and LII-edge peaks for Mn and Fe ions stayed unchanged against the change in Mn content x. The analysis of Mn K-edge extended X-ray absorption fine structure (EXAFS) revealed that Mn−O polyhedra was kept as an octahedron with Mn4+ irrespective of the x value, agreeing with the results of L-edge spectra. The Fe K-edge EXAFS analysis showed that the Fe–O distance decreased with decrease of the Mn contents, suggesting that the ratio of FeO₅ polyhedra to FeO₆ octahedra is increased due to smaller oxygen amount. By analyzing both the K-edge and L-edge spectra, we clarified the local electronic and atomic structural changes particularly occurred in the B-site mixed perovskite oxides.

中文翻译：

---

用 X 射线吸收光谱研究 SrFe1-xMnxO3-δ 中混合 B 位离子的局部电子和原子结构

钙钛矿 SrFe 中 B 位离子的局部电子和原子结构1-X锰X○3-δ用 X 射线吸收光谱 (XAS) 在 Mn、Feķ- 和大号-边和 Oķ-边缘。的能量大号三- 和大号二Mn 和 Fe 离子的 - 边缘峰相对于 Mn 含量的变化保持不变X. 锰的分析ķ边缘扩展 X 射线吸收精细结构 (EXAFS) 揭示了 Mn-O 多面体与 Mn 保持为八面体4+不论X值，与结果一致大号-边缘光谱。铁ķ-edge EXAFS分析表明，Fe-O距离随着Mn含量的降低而减小，表明FeO ₅多面体与FeO ₆八面体的比值由于氧量减少而增加。通过分析两者ķ-边缘和大号-边缘光谱，我们阐明了在 B 位混合钙钛矿氧化物中特别发生的局部电子和原子结构变化。