DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2014 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

TT: Fachverband Tiefe Temperaturen

TT 17: Superconductivity: Tunnelling, Josephson Junctions, SQUIDs

TT 17.6: Talk

Monday, March 31, 2014, 16:15–16:30, HSZ 201

Planar hybrid Josephson junctions with BaFe2−xCoxAs2 base electrode and a conventional Pb counter electrode using barriers from Au and TiOx — •Sebastian Döring1, Stefan Schmidt1, Manuel Monecke1, Volker Tympel1, Frank Schmidl1, Fritz Kurth2, Kazumasa Iida2, Ingolf Mönch3, Bernhard Holzapfel2,4, and Paul Seidel11Friedrich-Schiller-Universität Jena, Institut für Festkörperphysik, Helmholtzweg 5, 07743 Jena — 2IFW Dresden, Institut für Metallische Werkstoffe, Helmholtzstraße 20, 01069 Dresden — 3IFW Dresden, Institut für Integrative Nanowissenschaften, Helmholtzstraße 20, 01069 Dresden — 4Karlsruhe Institute of Technology, Institut für Technische Physik, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen

We prepared Josephson junctions from BaFe2−xCoxAs2 thin films using photolithography and ion beam etching to pattern the base electrode and sputtering of SiO2 for the preparation of insulation frameworks. The counter electrode was made from thermally evaporated lead in-situ covered by indium to avoid degradation. As barriers we use sputtered gold layers or additional layers from sputtered and subsequently oxidized titanium, respectively. While for the pure gold barrier we reached an IcRn-product of about 18 µV it could be increased to 90 µV using the additional TiOx layer. The current noise behavior and microwave response of the Josephson junctions could be improved, too.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2014 > Dresden