Robust coupling of superconducting order parameter in a mesoscale NbN-Fe-NbN epitaxial structure

Details Robust coupling of superconducting order parameter in a mesoscale NbN-Fe-NbN epitaxial structure Robust coupling of superconducting order parameter in a mesoscale NbN-Fe-NbN epitaxial structure

2009-07-09

arxiv.org/abs/0907.1490v1

Appl. Phys. Lett. 95, 042507 (2009)

Physics

Condensed Matter

Superconductivity

9 pages, 4 figures

Scientific paper

10.1063/1.3189284

We report an unconventional and promising route to self-assemble distributed superconductor-ferromagnet-superconductor (S-F-S) Josephson Junctions on single crystal [100] MgO. These structures consist of [110] epitaxial nano-plaquettes of Fe covered with superconducting NbN films of varying thickness. The S-F-S structures are characterized by strong magnetoresistance (MR) anisotropy for the in-plane and out-of-plane magnetic fields. The stronger in-plane MR suggests decoherence of S-F-S junctions whose critical current follows a (1-T/Tc) and (1-T/Tc)1/2 dependence for T Tc and T<

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