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1. Fe doped epitaxial YBCO films prepared by chemical solution deposition | |||
Zhang Hong,Wang Wentao,Zhao Yong | |||
Physics 05 January 2012 | |||
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Abstract:YBCO coated conductor has wide prospect in large scale application. But low current carrying capability restrain the practical application of YBCO coated conductor at high temperatures and high magnetic fields. Therefor, It is crucial for the preparation of theYBCO coated conductor with high critical current density. In this paper, epitaxial, dense, smooth and crack-free Fe doped YBCO films were prepared on LaAlO3 (LAO) single crystal substrate via a fluorine-free polymer-assisted metal organic deposition (PA-MOD) method. The effects of Fe doping on microstructure and superconducting character of YBCO films were investigated. The critical temperature for superconducting of the Fe doped YBCO film degrades slightly. However, In-field critical current density of YBCO films improves with this dilute Fe doping, except the doping quantity x = 0.005 compare to the pure YBCO film. Therefore, the current carring capability of YBCO film can improve through doping appropriate Fe in to the YBCO. It means that Fe doping in YBCO film may be a feasible way to prepare high performance conted conductor. | |||
TO cite this article:Zhang Hong,Wang Wentao,Zhao Yong. Fe doped epitaxial YBCO films prepared by chemical solution deposition[J]. |
2. Na-site Substitutions in Cobalt Oxyhydrate Superconductors | |||
Cao Guanghan ,Jiang Shuai ,Ren Zhi | |||
Physics 03 January 2008 | |||
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Abstract:Na-site substitutions were performed in cobalt oxyhydrate superconductor using an ion-exchange post treatment, with the various exchanging ions. The ion-exchange reaction with Li+, K+, and NH4+ ions resulted in the destruction of the bilayer hydrate structure. Meanwhile, the ion-exchanges with Mg2+, Ca2+, Sr2+ and Ba2+ ions were successful. The incorporation of alkaline-earth ions was found to be related to the similarity in size between the guest ion and the host one. About half of the sodium was replaced by calcium. The substituted bilayer hydrates were all superconductors with the Tc from 3.1 to 4.5 K. | |||
TO cite this article:Cao Guanghan ,Jiang Shuai ,Ren Zhi . Na-site Substitutions in Cobalt Oxyhydrate Superconductors[OL].[ 3 January 2008] http://en.paper.edu.cn/en_releasepaper/content/17702 |
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