X-RAY RIETVELD STUDY OF NONSUPERCONDUCTING 0212 CUPRATE - LA1.6SR0.4CACU2OY

被引：12

作者：

ADACHI, S

ADACHI, H

SETSUNE, K

WASA, K

机构：

[1] Central Research Laboratories, Matsushita Electric Industrial Co., Ltd., Moriguchi, Osaka, 570

来源：

PHYSICA C | 1990年 / 169卷 / 5-6期

关键词：

D O I：

10.1016/0921-4534(90)90579-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Rietveld analysis of powder XRD data for two nonsuperconducting La1.6Sr0.4CaCu2Oy ceramics which had similar oxygen content (<0.1 per formula at y=6) and showed different electrical resistive properties was carried out. It revealed that strontium occupied 2a site in order to eliminate the size mismatch in the a-b plane between apical and bottom sides of Cu-O5 pyramid, and that the sample with higher resistivity has a longer distance between two copper atoms in the Cu-O5 pyramidal bottom facing each other. It is considered that the observed remarkable difference in resistivity was caused by small changes in oxygen content and/or location of copper atoms. © 1990.

引用

页码：377 / 380

页数：4

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