Magnetic moment manipulation by triplet Josephson current

Abstract

The induced magnetic moment, provided by the bands electrons, is calculated in a variety of Josephson junctions with multilayered ferromagnetic (F) weak link. The noncollinear magnetization of the F layers provides the conditions necessary to generate triplet superconducting correlations. It leads to the long-range induced magnetic moment, emerging in the superconducting (S) layers. It is shown to be dependent on the Josephson phase. By tuning the Josephson current, one may control the long-range induced magnetic moment. Alternatively, applying the voltage we can generate an oscillatory magnetic moment. The detection of such a spin effect may serve as independent evidence of the triplet superconductivity. The proposed mechanism seems to be attractive for superconducting spintronic devices with low dissipation.

5 pages, 2 figures, submitted to Applied Physics Letters

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• In situ transport characterization of magnetic states in Nb/Co superconductor/ferromagnet heterostructures
• Static and dynamic properties of Josephson weak links with singlet and triplet coupling
• Theoretical study of magnetism induced by proximity effect in a ferromagnetic Josephson junction with a normal metal
• Magnetism induced by nonlocal spin-entangled electrons in a superconducting spin-valve
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