Reduction dependence of superconductivity in undoped T' cuprates

Autor:	Matsumoto, Osamu, Utsuki, Aya, Tsukada, Akio, Yamamoto, Hideki, Manabe, Takaaki, Naito, Michio
Rok vydání:	2008
Předmět:	Condensed Matter - Superconductivity
Druh dokumentu:	Working Paper
DOI:	10.1016/j.physc.2009.05.105
Popis:	We have recently achieved superconductivity in undoped 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. Comment: 13 pages, 4 figures; International Symposium on Superconductivity 2008
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0811.1077 Zobrazit plný text záznamu View this record from Arxiv