Crystal structure and superconducting properties of La1.85Ca1.15Cu2O6+δ
作者： Kyoichi Kinoshita , Hiroyuki Shibata , Tomoaki Yamada
DOI: 10.1016/0921-4534(91)90046-2
关键词: Oxygen 、 Crystal structure 、 Crystallography 、 Lattice constant 、 Diffraction 、 Condensed matter physics 、 Superconductivity 、 Rietveld refinement 、 Materials science
摘要: Abstract La1.85Ca1.15Cu2O6+δ becomes a superconductor when synthesized under high O2 pressure although La1.85Sr1.15Cu2O6+δ is not. The crystal structures of both compounds are determined by Rietveld analysis X-ray diffraction data as function during synthesis. ordering La and Ca sites increases with increasing synthesis for but not La1.85Sr1.15Cu2O6+δ. interatomic distance between Cu apical site oxygen shorter in than even though lattice parameter c longer relationship such structure superconductivity discussed comparison nonsuperconducting La1.85Ca1.15Cu2O6-δ
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