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Local electronic and atomic structures of the mixed B-site ions in SrFe1−xMnxO3−δ studied with X-ray absorption spectroscopy
International Journal of Modern Physics B ( IF 1.7 ) Pub Date : 2021-06-12 , DOI: 10.1142/s0217979221400488 Masatsugu Oishi 1 , Fumito Fujishiro 2 , Toshiaki Ina 3 , Hirona Yamagishi 4 , Iwao Watanabe 4 , Toshiaki Ohta 4
International Journal of Modern Physics B ( IF 1.7 ) Pub Date : 2021-06-12 , DOI: 10.1142/s0217979221400488 Masatsugu Oishi 1 , Fumito Fujishiro 2 , Toshiaki Ina 3 , Hirona Yamagishi 4 , Iwao Watanabe 4 , Toshiaki Ohta 4
Affiliation
Local electronic and atomic structures of the B-site ions in perovskite SrFe1 − x Mnx O3 − δ were evaluated with X-ray absorption spectroscopy (XAS) at Mn, Fe K - and L -edges and O K -edge. The energy of L III - and L II -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。
更新日期:2021-06-12
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