Spin-valve Josephson junctions with perpendicular magnetic anisotropy for cryogenic memory

Abstract

We demonstrate a Josephson junction with a weak link containing two ferromagnets, with perpendicular magnetic anisotropy and independent switching fields in which the critical current can be set by the mutual orientation of the two layers. Such pseudospin-valve Josephson junctions are a candidate cryogenic memory in an all superconducting computational scheme. Here, we use Pt/Co/Pt/CoB/Pt as the weak link of the junction with $d_{\text{Co}}=0.6$ nm, $d_{\text{CoB}}=0.3$ nm, and $d_{\text{Pt}}=5$ nm and obtain a $60\%$ change in the critical current for the two magnetization configurations of the pseudospin-valve. Ferromagnets with perpendicular magnetic anisotropy have advantages over magnetization in-plane systems which have been exclusively considered to this point, as in principle the magnetization and magnetic switching of layers in the junction should not affect the in-plane magnetic flux.

5 pages, 3 figures

References in corpus (38)

• Spin torque switching with the giant spin Hall effect of tantalum
• Proximity effects in superconductor-ferromagnet heterostructures
• Odd Triplet Superconductivity and Related Phenomena in Superconductor-Ferromagnet Structures
• Coupling of two superconductors through a ferromagnet : evidence for a pi-junction
• Superconducting Spintronics
• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• Long-range effects in superconductor-ferromagnet structures
• Spin-Diffusion Lengths in Metals and Alloys, and Spin-Flipping at Metal/Metal Interfaces: an Experimentalist's Critical Review
• Spin-polarized supercurrents for spintronics: a review of current progress
• Observation of spin-triplet superconductivity in Co-based Josephson Junctions
• Hybrid superconducting-magnetic memory device using competing order parameters
• Enhancement of the Josephson current by an exchange field in superconductor-ferromagnet structures
• Critical Current Oscillations in Strong Ferromagnetic Pi-Junctions
• Controllable 0-pi Josephson junctions containing a ferromagnetic spin valve
• Beyond Moore's technologies: operation principles of a superconductor alternative
• Quantum--Classical Interface Based on Single Flux Quantum Digital Logic
• Controllable Josephson current through a pseudo-spin-valve structure
• CPP Magnetoresistance of Magnetic Multilayers: A critical review
• Supercurrent in Long SFFS Junctions with Antiparallel Domain Configuration
• Critical current in SFIFS junctions
• Experimental demonstration of a Josephson magnetic memory cell with a programmable π-junction
• Deterministic field-free skyrmion nucleation at a nano-engineered injector device
• From inversion to enhancement of the Josephson current by an exchange field in S/F-I-F/S tunnel structures
• Josephson coupling through ferromagnetic heterojunctions with noncollinear magnetizations
• Josephson Current in S-FIF-S Junctions: Nonmonotonic Dependence on Misorientation Angle
• Spin-valve Josephson junctions for cryogenic memory
• Amplitude control of spin-triplet supercurrent in S/F/S Josephson junctions
• Supercurrent in ferromagnetic Josephson junctions with heavy metal interlayers
• Josephson current in a superconductor-ferromagnet junction with two non-collinear magnetic domains
• Nucleation of magnetisation reversal, from nanoparticles to bulk materials
• Josephson Junctions with a synthetic antiferromagnetic interlayer
• Phase Control in a Spin-Triplet SQUID
• Dynamic binding of driven interfaces in coupled ultrathin ferromagnetic layers
• Phase Controllable Josephson Junctions for Cryogenic Memory
• Area-dependence of spin-triplet supercurrent in ferromagnetic Josephson junctions
• Supercurrent in ferromagnetic Josephson junctions with heavy metal interlayers. II. Canted magnetization
• Controlling supercurrents and their spatial distribution in ferromagnets
• Ferromagnetic Josephson junctions for cryogenic memory

Cited by in corpus (10)

• Ferromagnetic Materials for Josephson π Junctions
• Distortions to the penetration depth and coherence length of superconductor/normal-metal superlattices
• Mesoscopic superconducting memory based on bistable magnetic textures
• Josephson spin-valve realization in the magnetic nodal-line topological semimetal Fe${}_3$GeTe${}_2$
• Pt and CoB trilayer Josephson $\pi$ junctions with perpendicular magnetic anisotropy
• Phase dynamics of tunnel Al-based ferromagnetic Josephson junctions
• Upper critical fields in normal metal-superconductor-normal metal trilayers
• Comparison of NiFeCr and NiFe in ferromagnetic Josephson junctions
• Josephson diode and spin-valve effects on the surface of altermagnet CrSb
• Demonstration of 0-pi transition in Josephson junctions containing unbalanced synthetic antiferromagnets