Berlin 2008 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 17: Poster: Trends in Ion Beam Technology, Magnetism in Thin Films, Functional Oxides, High-k Dielectric Materials, Semiconductor Nanophotonics, Nanoengineered Thin Films, Layer Deposition Processes, Layer Growth, Layer Properties, Thin Film Characterisation, Metal and Amorphous Layers, Application of Thin Films
DS 17.23: Poster
Dienstag, 26. Februar 2008, 09:30–13:30, Poster A
Formation and superconducting properties of YBa2Cu3O7−x / Y2Ba4CuMOy (M=Zr,Nb) quasi-multilayers prepared by off-axis PLD — •Elke Backen, Ruben Hühne, Ludwig Schultz, and Bernhard Holzapfel — IFW Dresden, P.O. Box 270116, 01171 Dresden, Germany
A significant enhancement of pinning forces in YBCO is possible by the introduction of nanosized transition metal particles (Ir, Ti, Hf, Zr) as artificial pinning centres using a quasi-multilayer deposition technique, i.e. the deposition of multilayers of subsequent complete YBCO and incomplete dopant layers. Another promising candidate for the use as artificial pinning centres in YBCO is Y2Ba4CuMOy (Y2411) (M=U, Nb, Ta, W, M, Zr, Ag). These second-phase, nanoscale inclusions have been successfully introduced into large, single-grain, bulk [Rare-Earth (RE)]-Ba-Cu-O superconductors where they form effective magnetic flux pinning sites over a wide range of external magnetic fields. A significant improvement of the Jc and the irreversibility field Hirr was observed in these samples. In this work we present first results on YBCO/Y2411 (M=Zr,Nb) quasi-multilayers prepared by off-axis pulsed laser deposition (PLD).