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Regensburg 2010 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 9: SC: Poster Session

TT 9.20: Poster

Monday, March 22, 2010, 14:00–18:00, Poster A

Investigation on ironarsenide superconductors for their application in Josephson junctions — •Sebastian Döring1, Stefan Schmidt1, Veit Große1, Frank Schmidl1, Paul Seidel1, Martin Kidszun2, Silvia Haindl2, Bernhard Holzapfel2, and Ingolf Mönch21Friedrich-Schiller-University Jena, Institute of Solid State Physics, Helmholtzweg 5, 07743 Jena, Germany — 2IFW Dresden, Institute for Metallic Materials, Helmholtzstrasse 20, 01069 Dresden. Germany

We investigate the possibility to produce and characterize Josephson junctions, based on new ironarsenide superconductors. Starting with LaO1−xFxFeAs thin films, which were produced by pulsed laser deposition (PLD), we present structures, in which Josephson effects can be studied. Because of the technological requirements, tunnel-like structures with natural or artificial barriers seems to be best suited for such investigations. Therefore the ironarsenide base electrode and subsequently the tunnel area were structured by ion beam etching. Sputtered SiO2 thin films were used as insulating materials. For the counter electrode, conventional superconductors (e.g. Pb, Nb) can be used. We present the first measurement on such systems.

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