Controllable generation of a spin-triplet supercurrent in a Josephson spin-valve

Abstract

It has been predicted theoretically that an unconventional odd-frequency spin-triplet component of superconducting order parameter can be induced in multilayered ferromagnetic structures with non-collinear magnetization. In this work we study experimentally nano-scale devices, in which a ferromagnetic spin valve is embedded into a Josephson junction. We demonstrate two ways of in-situ analysis of such Josephson spin valves: via magnetoresistance measurements and via in-situ magnetometry based on flux quantization in the junction. We observe that supercurrent through the device depends on the relative orientation of magnetization of the two ferromagnetic layers and is enhanced in the non-collinear state of the spin valve. This provides a direct prove of controllable generation of the spin-triplet superconducting component in a ferromagnet.

References in corpus (5)

• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• Triplet proximity effect in FSF trilayers
• Reversible control of spin-polarised supercurrents in ferromagnetic Josephson junctions
• Magnetic anisotropy in ferromagnetic Josephson junctions
• The anti-ordinary Hall effect in NiPt thin films

Cited by in corpus (5)

• Beyond Moore's technologies: operation principles of a superconductor alternative
• Spin-triplet supercurrent in Josephson junctions containing a synthetic antiferromagnet with perpendicular magnetic anisotropy
• Observation of the dominant spin-triplet supercurrent in Josephson spin valves with strong Ni ferromagnets
• YBa2Cu3O7/LaXMnO3 (X: Ca, Sr) based Superconductor/Ferromagnet/Superconductor junctions with memory functionality
• Magnetic-field-orientation-dependent triplet supercurrents in Josephson junctions with symmetric and asymmetric exchange-spring interfaces