Effect of substituting potassium for barium on the superconductivity of RBa2Cu3O7(R=y and Eu)

被引：0
|
作者：
Felner, I. [1 ]
Kowitt, M. [1 ]
Lehavi, Y. [1 ]
Ben-Dor, L. [1 ]
Wolfus, Y. [1 ]
Barbara, B. [1 ]
Nowik, I. [1 ]
机构：
[1] Hebrew Univ of Jerusalem, Israel
来源：
Physica C: Superconductivity and its Applications | 1988年 / 153-55卷 / 01期
关键词：
Ceramic Materials - Oxides - Superconductivity;
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学科分类号：
摘要：
We have studied the crystal structure and magnetic susceptibility of high Tc single phase RBa2-xKxCu3O7-δ, where x=0 to 1 and R=Y, Eu. All the YBa2-xKxCu3O7-delta samples have the same orthorhombic crystal structure and are superconducting with almost the same Tc. In EuBa2-xKxCu3O7 the crystal structure changes from orthorhombic to tetragonal and a progressive decrease in Tc is observed when x is increased. EuBaKCu3O7-delta is not superconducting. The decrease in the cation charge reduces both the oxygen concentration and the average valency of the copper.
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页码：898 / 899
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