Fe-Site Substitution Effect on the Structural and Magnetic Properties in SrFeO2

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• 作者：Liis Seinberg ; Takafumi Yamamoto ; Ce虂dric Tassel ; Yoji Kobayashi ; Naoaki Hayashi ; Atsushi Kitada ; Yuji Sumida ; Takashi Watanabe ; Masakazu Nishi ; Kenji Ohoyama ; Kazuyoshi Yoshimura ; Mikio Takano ; Werner Paulus ; Hiroshi Kageyama
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：May 2, 2011
• 年：2011
• 卷：50
• 期：9
• 页码：3988-3995
• 全文大小：984K
• 年卷期：v.50,no.9(May 2, 2011)
• ISSN：1520-510X

文摘

We investigated the Fe-site substitution effect on the structural and magnetic properties of the infinite layer iron oxide Sr(Fe_1-xM_x)O₂ (M = Co, Mn) using synchrotron X-ray diffraction, neutron diffraction, and ⁵⁷Fe M枚ssbauer spectroscopy. Both systems have a similar solubility limit of x 鈮?0.3, retaining the ideal infinite layer structure with a space group of P4/mmm. For the Fe鈭扖o system, both in-plane and out-of-plane axes decrease linearly and only slightly with x, reflecting the ionic radius difference between Fe²⁺ and Co²⁺. For the Fe鈭扢n system the lattice evolution also follows Vegard鈥檚 law but is anisotropic: the in-plane axis increases, while the out-of-plane decreases prominently. The magnetic properties are little influenced by Co substitution. On the contrary, Mn substitution drastically destabilizes the G-type magnetic order, featured by a significant reduction and a large distribution of the hyperfine field in the M枚ssbauer spectra, which suggests the presence of magnetic frustration induced presumably by a ferromagnetic out-of-plane Mn鈭扚e interaction.