Dresden 2011 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 10: Poster Session: Superconductivity
TT 10.4: Poster
Monday, March 14, 2011, 14:00–18:00, P4
Phase formation and critical current density in YBCO based quasimultilayers prepared by off-axis pulsed laser deposition — •Elke Reich1,3, Thomas Thersleff1,3, Ruben Hühne1, Kazumasa Iida1, Ludwig Schultz1,2,3, and Bernhard Holzapfel1,3 — 1IFW Dresden, Institute for Metallic Materials, P.O. Box 270116, D-01171 Dresden, Germany — 2TU Dresden, Department of Physics, Institute for Physics of Solids, D-01062 Dresden, Germany — 3TU Dresden, Department of Mechanical Engineering, Institute for Material Science, D-01062 Dresden, Germany
The use of coated conductors for power applications requires the improvement of the critical current densities in high magnetic fields. Significant research effort has been undertaken to investigate and enhance the flux pinning forces of high-temperature superconducting thin films. One possibility is the introduction of nano-sized defects into the superconductor thereby creating quasimultilayers of a complete superconducting layer and an incomplete dopant layer. In this work we present the phase formation and critical current density characteristics of YBCO based quasimultilayers doped with the double perovskite phase Y2Ba4CuMOy (Y2411) (M=Zr and Nb). We will show evidence for a reaction from the Y2411 phase to a simple Yttrium doped perovskite Ba(M1−xYx)O3 during film deposition. These second-phase inclusions clearly enhance Jc in high magnetic fields.