X-RAY-ABSORPTION STUDIES OF LA2-X(BA,SR)XCUO4 HIGH-T(C) SUPERCONDUCTORS

被引：6

作者：

AKHTAR, MJ ^{[1
]}

AKHTAR, ZN ^{[1
]}

CATLOW, CRA ^{[1
]}

机构：

[1] UCL ROYAL INST GREAT BRITAIN, DAVY FARADAY RES LAB, LONDON W1X 4BS, ENGLAND

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1993年 / 209卷 / 04期

关键词：

D O I：

10.1016/0921-4534(93)90548-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Extended X-my absorption fine structure (EXAFS) spectroscopy measurements have been used to study the local environment of different cations in high-T(c) superconducting compounds La2-x(Ba,Sr)xCuO4, with x = 0.15, 0.20. We show that the La-O bond length differs from the Ba-O and Sr-O bond lengths. The bond lengths between the dopant and oxygen atoms vary with the concentration of the dopant. The Cu-O bond lengths also vary on doping La2CuO4 with Ba or Sr at La sites. However, these variations are more significant for the Cu-O (2) bond (where O (2) is also bonded to a La (Ba, Sr) atom), than for the Cu-O(1) bond length.

引用

页码：373 / 380

页数：8

共 35 条

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