CRYSTAL-STRUCTURE OF A BA-Y-CU-O SUPERCONDUCTOR AS REVEALED BY RIETVELD ANALYSIS OF X-RAY-POWDER DIFFRACTION DATA

被引：68

作者：

IZUMI, F

ASANO, H

ISHIGAKI, T

ONO, A

OKAMURA, FP

机构：

[1] Natl Inst for Research in Inorganic, Materials, Sakura-Mura, Jpn, Natl Inst for Research in Inorganic Materials, Sakura-Mura, Jpn

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1987年 / 26卷 / 05期

关键词：

BARIUM COMPOUNDS - Electric Conductivity - CERAMIC MATERIALS - CRYSTALS - Structure - X-RAYS - Diffraction;

D O I：

10.1143/JJAP.26.L611

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The crystal structure of a Ba-Y-Cu-O superconductor was refined by the Rietveld analysis of X-ray powder diffraction data. This material is orthorhombic with lattice parameters a equals 3. 8845 Angstrom, b equals 3. 8293 Angstrom, and c equals 11. 6926 Angstrom. Possible space groups are P222, Pmm2, and Pmmm. Metal atoms have essentially the same configuration as that in the perovskite-type structure. A structural model is proposed in which an oxygen atom at (0, 0, one-half ) is deficient.

引用

页码：L611 / L612

页数：2