New Iron Arsenide Oxides (Fe2As2)(Sr4(Sc, Ti)3O8), (Fe2As2)(Ba4Sc3O7.5), and (Fe2As2)(Ba3Sc2O5)

被引：43
作者：
Kawaguchi, Naoto [1 ,2 ]
Ogino, Hiraku [1 ,2 ]
Shimizu, Yasuaki [1 ,2 ]
Kishio, Kohji [1 ,2 ]
Shimoyama, Jun-ichi [1 ,2 ]
机构：
[1] Univ Tokyo, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan
[2] Japan Sci & Technol Agcy, Transformat Res Project Iron Pnictides JST TRIP, Chiyoda Ku, Tokyo 1020075, Japan
来源：
APPLIED PHYSICS EXPRESS | 2010年 / 3卷 / 06期
关键词：
Barium compounds - Arsenic compounds - Iron oxides;
D O I：
10.1143/APEX.3.063102
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We synthesized new layered iron arsenide oxides (Fe2As2)(Sr-4(Sc, Ti)(3)O-8), (Fe2As2)(Ba4Sc3O7.5), and (Fe2As2)(Ba3Sc2O5). The crystal structures of these compounds are tetragonal with a space group of I4/mmm. The structure of (Fe2As2)(Sr-4(Sc, Ti)(3)O-8) and (Fe2As2)(Ba4Sc3O7.5) consists of the alternate stacking of antifluorite Fe2As2 layers and triple perovskite-type oxide layers. The interlayer distance between the Fe planes of (Fe2As2)(Ba4Sc3O7.5) is similar to 18.7 angstrom. Moreover, the a-axis of (Fe2As2)(Ba3Sc2O5) is the longest among the layered iron pnictides, indicating the structural flexibility of the layered iron pnictide containing perovskite-type layers. The bulk sample of (Fe2As2)(Sr-4(Sc0.6Ti0.4)(3)O-8) exhibited diamagnetism up to 28 K in susceptibility measurements. (C) 2010 The Japan Society of Applied Physics
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页数：3
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