Single Crystal X-Ray Structure Analysis of Bi2(Sr, Ca)2CuOx and Bi2(Sr, Ca)3Cu2Ox Superconductors

Single Crystal X-Ray Structure Analysis of Bi2(Sr, Ca)2CuOx and Bi2(Sr, Ca)3Cu2Ox Superconductors
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Bi2(Sr, Ca)2CuOx 和 Bi2(Sr, Ca)3Cu2Ox 超导体的单晶 X 射线结构分析

DOI:
10.1143/jjap.27.l1661
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发表时间:
1988
影响因子:
1.5
通讯作者:
A. Ono
A. Ono
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Katsuhiro Imai;I. Nakai;T. Kawashima;S. Sueno;A. Ono

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使用应用各向异性温度因子的单晶X射线强度数据分析Bi 2(Sr,Ca)2CuOx和Bi 2(Sr,Ca)3Cu 2 Ox的平均晶体结构。晶体数据:Bi_2Sr_(1.60)Ca_(0.40)CuO_6,Bbmb,a=5.3826(8)nm,B=5.3761(11),c=24.384(7),Rw=0.108(282个反射); Bi_(2.06)Sr_(1.70)Ca_(1.24)Cu_2 O_8,Bbmb,a=5.3946(8),B=5.3895(13),c=30.649(12),Rw=0.064(354个反射)。旋进照片表明,Bi2Sr1.60Ca0.40CuO6具有单斜调制结构,Bi2.06Sr1.70Ca1.24Cu2O8具有正交调制结构。利用调制波模型定性地描述了无公度调制结构。
Average crystal structures of Bi2(Sr, Ca)2CuOx and Bi2(Sr, Ca)3Cu2Ox were analyzed using single crystal X-ray intensity data applying anisotropic temperature factors. Crystal data: Bi2Sr1.60Ca0.40CuO6, Bbmb, a=5.3826(8) Å, b=5.3761(11), c=24.384(7), Rw=0.108 for 282 reflections; Bi2.06Sr1.70Ca1.24Cu2O8, Bbmb, a=5.3946(8), b=5.3895(13), c=30.649(12), Rw=0.064 for 354 reflections. Precession photographs show that Bi2Sr1.60Ca0.40CuO6 has a monoclinic modulated structure and Bi2.06Sr1.70Ca1.24Cu2O8 has an orthorombic one. The incommensurate modulated structures were qualitatively illustrated by using a modulation wave model.