Out of plane superconducting Nb/Cu/Ni/Cu/Co triplet spin-valves

摘要

The critical temperature of a triplet superconducting spin valve depends on the effectiveness of the conversion of singlet pairs in the superconductor into triplet pairs which can penetrate a ferromagnet and so drive a strong proximity effect. Here, we compare the out-of plane field dependence of the critical temperature in transition metal triplet spin valves with otherwise equivalent samples in which the singlet-triplet converting spin mixer ferromagnet layer is omitted. We report a significant field-dependent difference between the samples, which is consistent with a magnetisation orientation dependent spin mixing efficiency in the spin valve.