DIRECT OXIDATION OF LA2CUO4 IN AN AQUEOUS-SOLUTION OF KMNO4

被引：57

作者：

TAKAYAMAMUROMACHI, E

SASAKI, T

MATSUI, Y

机构：

[1] National Institute for Research in Inorganic Materials, Tsukuba, Ibaraki, 305

来源：

PHYSICA C | 1993年 / 207卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(93)90427-R

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This report presents a new method to obtain superconducting La2CuO4+delta. The La2CuO4 obtained by the normal solid state reaction was oxidized in an aqueous solution of KMnO4. The product included excess oxygen up to delta approximately 0.09 and showed bulk superconductivity below about 40 K. Two different orthorhombic phases appeared upon increasing of delta; one had a smaller orthorhombic distortion while the other had a larger one, compared with the stoichiometric La2CuO4. Electron diffraction patterns suggested a complicated manner of ordering of the interstitial oxygen atoms in the sample with delta approximately 0.09.

引用

页码：97 / 101

页数：5

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