CHARACTERIZATION OF INCOMMENSURATE BI2+XSR2-XCUOZ BY X-RAY-POWDER DIFFRACTION AND OXYGEN-CONTENT DETERMINATIONS

被引：26

作者：

SINCLAIR, DC

IRVINE, JTS

WEST, AR

机构：

[1] Department of Chemistry, University of Aberdeen, Great Britain

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1990年 / 29卷 / 11期

关键词：

Bismuth strontium cuprate; Cuprate superconductor; Incommensurate structure;

D O I：

10.1143/JJAP.29.L2002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The composition-temperature stability region of the solid solution Bi2+xSr2-xCuOz, phase R, has been determined. At 800°C, and at melting temperatures, with a supercell vector q*given by q*=n δb*-nεc*, where δ=0.21, ε=0.55, for x=0.30 and n=1, 2 …. Both a and ε increased with x, c decreased with x and δ was independent of x. The excess oxygen content, α, was determined to be (0.18±0.02) by citrate iodometry and was independent of x. The total oxygen content z, given by z=6+x/2+α, was confirmed to be 6.33±0.04, for x=0.30, by hydrogen reduction thermogravimetry. © 1990 IOP Publishing Ltd.

引用

收藏

页码：L2002 / L2005

页数：4

相关论文

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