Electron Diffraction and Microscopy of the Structure of La-Ba(Sr)-Cu Oxides at Room Temperature
Electron Diffraction and Microscopy of the Structure of La-Ba(Sr)-Cu Oxides at Room Temperature
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La-Ba(Sr)-Cu氧化物室温结构的电子衍射和显微镜观察
DOI：
10.1143/jjap.26.l380
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发表时间：
1987
影响因子：
1.5
通讯作者：
T. Yamashita
中科院分区：
文献类型：
--
作者：
Y. Hirotsu;S. Nagakura;Yuzo Murata;T. Nishihara;M. Takata;T. Yamashita
用电子衍射和显微镜研究了La-Ba（Sr）-Cu氧化物的室温结构。在正交晶系的La_（1.9）Ba_（0.1）CuO_4中发现了微弱的额外反射，空间群确定为Pccm。而四元La_（1.8）Ba_（0.2）CuO_4（起始温度Tc=28 K）和La_（1.8）Sr_（0.2）CuO_4（起始温度Tc=36 K）则没有额外的反射。高分辨率揭示了这些化合物中的金属原子排列。
Structural study of the La-Ba(Sr)-Cu oxides was made by means of electron diffraction and microscopy at room temperature. In the orthorhombic La1.9Ba0.1CuO4 weak extra reflections are found and the space group was determined as Pccm. On the other hand, no extra reflections are found for the tetragonal La1.8Ba0.2CuO4 with onset Tc=28 K and La1.8Sr0.2CuO4 with onset Tc=36 K. High resolution reveals the metal atom arrangement in these compounds.