Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 12: Poster Session Superconductivity
TT 12.40: Poster
Montag, 11. März 2013, 15:00–19:00, Poster D
Josephson junctions based on pnictide superconductors — •Martin Feltz1, Stefan Schmidt1, Sebastian Döring1, David Reifert1, Sandra Gottwals1, Noor Ali Hasan1, Manuel Monecke1, Frank Schmidl1, Kazumasa Iida2, Fritz Kurth2, Bernhard Holzapfel2, and Paul Seidel1 — 1Friedrich-Schiller-Universität Jena, Institut für Festkörperphysik, Helmholtzweg 5, 07743 Jena, Germany — 2IFW Dresden, Institute for Metallic Materials, Helmholtzstrasse 20, 01069 Dresden, Germany
Josephson junctions are a powerful tool for understanding more about the physical behaviour of pnictide superconductors. We built different kinds of Josephson junctions based on pnictide thin films. Planar junctions, edge type junctions, and junctions on bicrystalline substrates were prepared. We present manufacturing techniques and also the electronical properties of the different junctions and compare them. The measurement of I-V-characteristics show a strong excess current. We have to mind this when calculating the IcRN product. The effective IcRN values are 6.5µV for the grain boundary junction, 7.9µV for the planar structure, and 7.5µV for the edge junction.
This work was partially supported by the EU within IRON-SEA (project no. FP7-283141), DFG within SPP 1458 (projects SE 664/15-1 and HA 5934/1-1), the DAAD and the Landesgraduiertenförderung Thüringen.
[1] S. Schmidt et al. IEEE-TAS (2012), accepted [arXiv:1211.3879]