Sr2FeO3 with Stacked Infinite Chains of FeO4 Square Planes

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• 作者：C茅dric Tassel ; Liis Seinberg ; Naoaki Hayashi ; Subodh Ganesanpotti ; Yoshitami Ajiro ; Yoji Kobayashi ; Hiroshi Kageyama
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：May 20, 2013
• 年：2013
• 卷：52
• 期：10
• 页码：6096-6102
• 全文大小：399K
• 年卷期：v.52,no.10(May 20, 2013)
• ISSN：1520-510X

文摘

The synthesis of Sr₂FeO₃ through a hydride reduction of the Ruddlesden鈥揚opper layered perovskite Sr₂FeO₄ is reported. Rietveld refinements using synchrotron and neutron powder diffraction data revealed that the structure contains corner-shared FeO₄ square-planar chains running along the [010] axis, being isostructural with Sr₂CuO₃ (Immm space group). Fairly strong Fe鈥揙鈥揊e and Fe鈥揊e interactions along [010] and [100], respectively, make it an S = 2 quasi two-dimensional (2D) rectangular lattice antiferromagnet. This compound represents the end-member (n = 1) of the serial system Sr_n+1Fe_nO_2n+1, together with previously reported Sr₃Fe₂O₅ (n = 2) and SrFeO₂ (n = 鈭?, thus giving an opportunity to study the 2D-to-3D dimensional crossover. Neutron diffraction and M枚ssbauer spectroscopy show the occurrence of G-type antiferromagnetic order below 179 K, which is, because of dimensional reduction, significantly lower than those of the other members, 296 K in Sr₃Fe₂O₅ and 468 K in SrFeO₂. However, the temperature dependence of magnetic moment shows a universal behavior.