RIETVELD ANALYSIS OF THE COMPOSITE CRYSTAL IN SUPERCONDUCTING BI2+XSR2-XCUO6+Y

被引：30

作者：

YAMAMOTO, A ^{[1
]}

TAKAYAMAMUROMACHI, E ^{[1
]}

IZUMI, F ^{[1
]}

ISHIGAKI, T ^{[1
]}

ASANO, H ^{[1
]}

机构：

[1] UNIV TSUKUBA,INST MAT SCI,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICA C | 1992年 / 201卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(92)90115-S

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The modulated crystals of Bi-based superconducting oxides are well described as composite crystals [Walker and Que, Phys. Rev. B 45 (1992) 14]. The structure of the superconducting oxide Bi2+xSr2-xCuO6+y was analyzed for the first time as composite crystal by the Rietveld method with the combined use of X-ray and TOF neutron diffraction data. It consists of two interpenetrating one-dimensionally modulated structures with the superspace groups N1BAR/B2/1/b and P1BAR/I2/s/m. The analysis revealed large atomic displacements from average positions in the Bi-O, Sr-O, Cu-O layers. The oxygen arrangement in the Bi-O layer is similar to that in Bi2+x(Sr, Ca)3-xCu2O8+y.

引用

页码：137 / 144

页数：8

共 23 条

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