Abstract
We show that by interfacing Co with Rh in Nb-based superconductor-ferromagnetic-superconductor (SFS) Josephson devices, the bulk magnetization of the Co barrier is completely preserved, thus eliminating the issue of a magnetic dead layer present in other SFS devices. Electrical measurements demonstrate high transparency for Cooper pairs at the Rh/Co interface which results in large critical currents in the π state which are comparable to those of Nb/Co/Nb devices [J. W. A. Robinson et al., Phys. Rev. Lett. 97, 177003 (2006)].
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