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TT: Fachverband Tiefe Temperaturen
TT 57: SC: Fe-based Superconductors - 122 - Thin Films
TT 57.5: Vortrag
Donnerstag, 17. März 2011, 18:15–18:30, HSZ 304
Thin film hybrid Josephson junctions with Co doped Ba-122. — •Stefan Schmidt1, Sebastian Döring1, Frank Schmidl1, Volker Tympel1, Veit Grosse1, Silvia Haindl2, Kazumasa Iida2, Fritz Kurth2, Ingolf Mönch3, Bernhard Holzapfel2, and Paul Seidel1 — 1Friedrich-Schiller-Universität Jena, Institut für Festkörperphysik, Helmholtzweg 5, 07743 Jena, Germany — 2IFW Dresden, Institut für metallische Werkstoffe, Helmholtzstrasse 20, 01069 Dresden, Germany — 3IFW Dresden, Institut für Integrative Nanowissenschaften, Helmholtzstrasse 20, 01069 Dresden, Germany
Josephson junctions are a strong tool to investigate fundamental superconducting properties, such as gap behaviour, dependencies from external fields and the order parameter symmetry. Finding secure values enables the possibility of theoretical descriptions to understand the physical processes within the new iron-based superconductors. Based on Co-doped BaFe2As2 (Ba-122) layers produced via pulsed laser deposition (PLD) on (La,Sr)(Al,Ta)O3 substrates, we manufactured superconductor-normal conductor-superconductor (S-N-S) junctions structures by using photolithography, ion beam etching as well as insulating SiO2 layers. We present working Ba-122 / Au / PbIn thin film Josephson junctions with different contact areas and barrier thicknesses, their temperature dependence and response to microwave irradiation. The calculated IcRN product is in the range of a couple of microvolts.