Properties of ferromagnetic Josephson junctions for memory applications

Abstract

In this work we give a characterization of the RF effect of memory switching on Nb-Al/AlOx-(Nb)-Pd${}_{0.99}$Fe${}_{0.01}$-Nb Josephson junctions as a function of magnetic field pulse amplitude and duration, alongside with an electrodynamical characterization of such junctions, in comparison with standard Nb-Al/AlOx-Nb tunnel junctions. The use of microwaves to tune the switching parameters of magnetic Josephson junctions is a step in the development of novel addressing schemes aimed at improving the performances of superconducting memories.

arXiv commentIEEE Trans. Appl. Supercond. Special Issue ISEC2017

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• RF assisted switching in magnetic Josephson junctions
• Protected 0-pi states in SIsFS junctions for Josephson memory and logic
• Inverse magnetic hysteresis of the Josephson supercurrent: study of the magnetic properties of thin niobium/permalloy (Fe_{20}Ni_{80}) interfaces
• Electrodynamics of Josephson junctions containing strong ferromagnets
• Competitive 0 and π states in S/F multilayers: multimode approach
• Supercurrent-Controlled Kinetic Inductance Superconducting Memory
• Mesoscopic superconducting memory based on bistable magnetic textures
• Anomalous current-voltage characteristics of SFIFS Josephson junctions with weak ferromagnetic interlayers
• Density of states and current-voltage characteristics in SIsFS junctions
• The physics of superconductor-ferromagnet hybrid structures
• Comparison of NiFeCr and NiFe in ferromagnetic Josephson junctions
• Enhancement of supercurrent through ferromagnetic materials by interface engineering
• A hybrid ferromagnetic transmon qubit: circuit design, feasibility and detection protocols for magnetic fluctuations