SPIN3 · Spin triplet pairings in ferromagnet Josephson junctions

Spin triplet pairings in ferromagnet Josephson junctions

For a long time, the coexistence of conventional superconductivity and ferromagnetism was believed to be impossible. In 2001 it was theoretically predicted that under certain conditions both phases could coexist in hybrid structures , giving rise to a race for the discovery of an entirely new kind of superconducting electron pairing state in which the electrons are in the triplet state. The novel hypothesis of this Action relies on the fact that triplet pairs can be formed combining ferromagnets, normal metals and superconductors which will represent an enormous improvement in comparison to the presently established spin-singlet-based devices. This Action consists of two supplementary stages starting from the maximization of spin-triplet current densities in hybrid ferromagnet junctions (materials science) to the understanding of the basic mechanisms of the spin triplet pairs and the nanofabrication of hybrid Josephson junctions in which the spin triplet supercurrent will be controlled (condensed matter physics). Once the objectives of this Action will be achieved, besides its inherent immediate impact on spintronics and condensed matter, the generation of a radically new technology will emerge. This new technological paradigm, the superconducting spintronics , will take advantage of the unique properties of the two macroscopic phases that were believed to be incompatible and has the potential to overcome significant limitations of logic circuits based separately on superconductivity and spintronics. The ultimate goal of this action focuses on the experimental study on unconventional electronic properties of charge transport in hybrid devices combining superconductors (S), ferromagnets (F) and normal metals (N) towards the complete understanding of spin-triplet-currents and spin-triplet-dynamics in such junctions. The action is inherently multidisciplinary and it will develop by combining a technological/materials science approach, focused on the maximization of the triplet spin currents in SFS and SF-N-FS junctions with a more fundamental/condensed matter physics one, where the spin triplet dynamics in S/F/N junctions will be studied by drawing on insights from the field of spintronics and superconductivity.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз