Berlin 2024 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 6: Superconductivity: Tunnelling and Josephson Junctions I
TT 6.4: Talk
Monday, March 18, 2024, 10:15–10:30, H 3010
Experimental and simulated realization of magnetization-controlled critical current in a ferromagnetically constricted Josephson junction — •Lukas Kammermeier and Elke Scheer — Universität Konstanz
We present an experimental realization of a magnetization (M) controlled Josephson junction in a superconductor-ferromagnet S-S’-S (S’=S/F) hybrid structure, which allows for a post-manufacturing manipulation of the critical current Ic. We observe multiple and non-monotonic discrete jumps of Ic(M) up to full supression depending on the magnetic history. In addition we reproduce the observed effects in micromagnetic simulations with MuMax3 [1] and a simple model of stray-field-mediated suppression of Ic. Resulting in a semi quantitaive microscopic explanation for the jumps in the Ic(M) measurements.
[1] A. Vansteenkiste, AIP Advances 4 (2014) 107133
Keywords: superconductivity; control of critical current; magnetic stray fields; S-F proximity effect; micromagnetic simulation