Low Temperature Synthesis of Sr₂FeO₃ with Square Planar Coordination

Abstract

The Ruddlesden-Popper phase Sr₂FeO₄ was reduced to Sr₂FeO₃ using calcium hydride as a low temperature powerful reducing agent. In the resulting framework, FeO4 square planes form chains that run parallel to each other. The structure and magnetism of the novel Sr₂FeO₃ will be compared to the infinite layer SrFeO₂ and spin-ladder Sr₃Fe₂O₅ compounds that also possess iron in an oxygen square planar coordination.