Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 16: Poster Session Superconductivity, Cryogenic Particle Detectors, Cryotechnique

TT 16.22: Poster

Montag, 16. März 2020, 15:00–19:00, P2/EG

Transport and ferromagnetic resonance in superconductor-ferromagnet junctions — •Andreas Bloch, Marcel Thalmann, Marcel Rudolf, Elke Scheer, and Torsten Pietsch — Physics Department, University of Konstanz, 78457 Konstanz, Germany

Hybrid superconductor nanostructures have the potential to overcome the limitations of conventional, dissipative electronic devices. We investigate novel spin and charge transport phenomena in superconductor (S) - ferromagnet (F) hybrid nanostructures under non-equilibrium conditions. We focus on ferromagnetic Josephson junctions (fJJs), where two S are separated by a F barrier. Theory predicts the possibility to generate long range triplet pairing in SF hybrid systems via a dynamic coupling of the electron spin to the magnetic resonance of the ferromagnet (FMR) [1]. We present here the first results of our project aiming at investigating experimentally this novel phenomenon. The samples under study are realized by electron beam and photo lithography. We use Al as S and Co or Py as F metal. A pre-patterned coplanar waveguide introduces microwaves (frequency up to 40 GHz) to the integrated SF contact to drive the FMR. The local and non-local current-voltage characteristics under irradiation will be discussed.

[1] S. Hikino et al., Supercond. Sci. Technol. 24, 024008 (2011)