Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1819314 | Physica C: Superconductivity and its Applications | 2009 | 4 Pages |
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
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Condensed Matter Physics
Authors
O. Matsumoto, A. Utsuki, A. Tsukada, H. Yamamoto, T. Manabe, M. Naito,