Effect of interfaces on supercurrent through ferromagnetic materials

Ferromagnetic Josephson junctions exhibit fascinating physics and the potential for applications in superconducting logic memory. The a demonstrated memory prototype contain magnetic spin-valve structure with Ni as fixed layer NiFe (Permalloy) free layer. However, exhibits poor supercurrent transmission, which limits efficiency of junction. We have previously shown that transmission through Cu/NiFe/Cu trilayer can be improved by adding thin layers between Cu -- possibly due to advantageous spin-dependent transport properties Cu/Ni interfaces. In this work we explore idea further replacing Cu/NiFe interfaces Pd/NiFe, also more desirable properties. Compared reference containing interfaces, new an increase $\pi$-state factor 2 along change position first $0-\pi$ transition.