Abstract Cubic perovskite oxide Ba1−xSrxFe0.9In0.1O3−δ (BSFI) with varying number of oxide ion vacancies was prepared by heating in N2 and O2 to elucidate the relationship among the local structure of Fe-O polyhedra, the chemical state of Fe ions, and their electrical conductivities. Mossbauer spectroscopy for the N2-heated specimens (BSFI-N2) showed that the volume of microdomains in which the Fe–O–Fe super-exchange interaction worked well increased as the Sr content increased, resulting in reduced activation energy of the small-polaron hopping. It was found that as the Sr content increased, the increase in the mobility of small polarons enhanced the electrical conductivity in BSFI-N2. Further, it was found that the increase in the number of the charge carriers and the small-polaron mobility enhanced the electrical conductivity of the O2-heated specimens (BSFI-O2) with increasing x.

中文翻译：

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Fe-O多面体中Fe离子的局部结构、化学状态与立方钙钛矿Ba1-Sr Fe0.9In0.1O3-δ电导率与不同氧化物离子空位数量的关系

摘要 通过在 N2 和 O2 中加热制备了具有不同数量氧化物离子空位的立方钙钛矿氧化物 Ba1−xSrxFe0.9In0.1O3−δ (BSFI)，以阐明 Fe-O 多面体的局部结构与 Fe 的化学状态之间的关系。离子及其导电性。N2 加热样品 (BSFI-N2) 的穆斯堡尔光谱表明，随着 Sr 含量的增加，Fe-O-Fe 超交换相互作用良好的微畴体积增加，导致小极化子的活化能降低跃迁。结果表明，随着 Sr 含量的增加，小极化子迁移率的增加增强了 BSFI-N2 的电导率。更多，