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 17.24: Poster
Dienstag, 26. Februar 2008, 09:30–13:30, Poster A
Microstructure and self-organization of nano-engineered artificial pinning centers in YBa2Cu3O7−δ coated conductors — •Thomas Thersleff, Elke Backen, Sebastian Engel, Bernd Rellinghaus, Ludwig Schultz, and Bernhard Holzapfel — IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany
The fabrication of YBa2Cu3O7−δ (YBCO) coated conductors capable of transporting large currents in high external magnetic fields is critical for their commercial implementation. The introduction of nano-sized Artificial Pinning Centers (APCs) immobilizes flux lines at higher fields, thus increasing the usefulness and commercial applicability of coated conductors. Moreover, careful nano-engineering of these APCs facilitates the fine-tuning of the superconducting properties of coated conductors such as enhanced pinning along specific crystallographic orientations or an overall reduction in anisotropy. Understanding the self-organizational behavior of these APCs and their effect on the superconducting properties of YBCO thin films is the focus of this work. TEM lamellae from samples prepared on single crystal SrTiO3 using both Pulsed Laser Deposition (PLD) and Chemical Solution Deposition (CSD) methods incorporating APCs were produced using a Carl Zeiss 1540XB Focused Ion Beam (FIB) employing the in-situ lift-out method. TEM investigations on both a FEI Tecnai G2 and Titan were carried out to elucidate the effect of the processing parameters on the organizational behavior of APCs and to subsequently correlate this to the macroscopic properties of these films.