Dresden 2014 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 30: Superconductivity - Poster Session
TT 30.5: Poster
Monday, March 31, 2014, 15:00–19:00, P2
Thick BaHfO3 doped YBa2Cu3O7−δ films on textured Ni-W tapes — •Max Sieger1, Jens Hänisch1, Kazumasa Iida1, Uwe Gaitzsch1, Christian Rodig1, Rainer Nast2, Ludwig Schultz1, Bernhard Holzapfel2, and Ruben Hühne1 — 1Institute for Metallic Materials, IFW Dresden, PO Box 27 01 16, D-01171 Dresden, Germany — 2Institute for Technical Physics, Karlsruhe Institute of Technology (KIT), PO Box 36 40, D-76021 Karlsruhe
High-temperature superconductors grown on metallic tapes (coated conductors) might be used in a wide range of applications such as electric cables, MRI and fusion magnets. To achieve highest transport currents in magnetic fields, flux lines have to be immobilized by introducing nanoscaled pinning centres. In this study, we have prepared YBa2Cu3O7−δ (YBCO) thick films (∼ 1 µm) with different amounts of BaHfO3 (BHO) on highly alloyed biaxially textured Ni-W tapes by pulsed laser deposition and discuss the effect of deposition parameters and BHO contents on the superconducting properties. X-Ray diffraction showed a good texture transfer from the nickel alloy tape via the buffer system to the superconducting layer. In general, a superconducting transition temperature Tc of about 88 K with a small transition width was determined. The incorporation of artificial pinning centres led to improved in-field critical current densities Jc(µ0H) and to an increase of the irreversibility field Hirr.