Article ID Journal Published Year Pages File Type
1819314 Physica C: Superconductivity and its Applications 2009 4 Pages PDF
Abstract

We have recently achieved superconductivity in T′-RE2CuO4 (RE: Pr, Nd, Sm, Eu, and Gd), using epitaxial thin films by metal organic decomposition. The key recipes to achieve superconductivity are low-PO2 firing and subsequent vacuum reduction to minimize the amount of impurity oxygen atoms, which are very harmful to high-Tc superconductivity. In this article, we report our investigation on the reduction dependence of superconductivity of T′-RE2CuO4. For thin films, the amount of remnant Oap atoms is difficult to evaluate but we propose that one good measure for this may be the c-axis lattice constant, which tells us whether the reduction is insufficient or excessive.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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