Performance of synthetic antiferromagnetic racetrack memory: domain wall vs skyrmion

Abstract

A storage scheme based on racetrack memory, where the information can be coded in a domain or a skyrmion, seems to be an alternative to conventional hard disk drive for high density storage. Here, we perform a full micromagnetic study of the performance of synthetic antiferromagnetic (SAF) racetrack memory in terms of velocity and sensitivity to defects by using experimental parameters. We find that to stabilize a SAF skyrmion, the Dzyaloshinskii-Moriya Interaction in the top and the bottom ferromagnet should have an opposite sign. The velocity of SAF skyrmion and SAF Neel domain wall are of the same order and can reach values larger than 1200 m/s if a spin-orbit torque from the spin-Hall effect with opposite sign is applied to both ferromagnets.

References in corpus (33)

• Spin torque switching with the giant spin Hall effect of tantalum
• Spin Hall effect
• Magnetic switching by spin torque from the spin Hall effect
• Current-driven dynamics of chiral ferromagnetic domain walls
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Observation of room temperature magnetic skyrmions and their current-driven dynamics in ultrathin Co films
• Blowing Magnetic Skyrmion Bubbles
• Spin transfer torque devices utilizing the giant spin Hall effect of tungsten
• Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
• Direct Observation of the Skyrmion Hall Effect
• Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
• Skyrmions at room temperature : From magnetic thin films to magnetic multilayers
• Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
• Room temperature chiral magnetic skyrmion in ultrathin magnetic nanostructures
• Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction
• Current-induced skyrmion dynamics in constricted geometries
• Skyrmion Hall Effect Revealed by Direct Time-Resolved X-Ray Microscopy
• Theory of current-driven motion of Skyrmions and spirals in helical magnets
• Static and Dynamical Properties of Antiferromagnetic Skyrmions in the Presence of Applied Current and Temperature
• Magnetic bilayer-skyrmions without skyrmion Hall effect
• Spin torque study of the spin Hall conductivity and spin diffusion length in platinum thin films with varying resistivity
• Interfacial Dzyaloshinskii-Moriya interaction in perpendicularly-magnetized Pt/Co/AlO${}_x$ ultrathin films measured by Brillouin light spectroscopy
• Magnon-skyrmion scattering in chiral magnets
• Domain wall tilting in the presence of the Dzyaloshinskii-Moriya interaction in out-of-plane magnetized magnetic nanotracks
• Memory functions of magnetic skyrmions
• Current-driven skyrmion dynamics in disordered films
• Dynamical Skyrmion State in a Spin Current Nano-Oscillator with Perpendicular Magnetic Anisotropy
• Skyrmion based microwave detectors and harvesting
• Magnetic radial vortex stabilization and efficient manipulation driven by the Dzyaloshinskii Moriya Interaction and the spin-transfer torque
• Spin-Hall Nano-oscillator: a micromagnetic study
• A Dzyaloshinskii-Moriya Anisotropy in Nanomagnets with in-plane Magnetization
• Switching Properties in Magnetic Tunnel Junctions with Interfacial Perpendicular Anisotropy: Micromagnetic Study
• Influence of the Dzyaloshinskii-Moriya interaction on the spin-torque diode effect

Cited by in corpus (33)

• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Skyrmion-electronics: Writing, deleting, reading and processing magnetic skyrmions toward spintronic applications
• Fast current-induced skyrmion motion in synthetic antiferromagnets
• Skyrmions in synthetic antiferromagnets and their nucleation via electrical current and ultrafast laser illumination
• Theory of Topological Spin Hall Effect in Antiferromagnetic Skyrmion: Impact on Current-induced Motion
• Static and dynamic properties of bimerons in a frustrated ferromagnetic monolayer
• Micromagnetic modeling of Terahertz oscillations in an antiferromagnetic material driven by spin-Hall effect
• Coexistence of distinct skyrmion phases observed in hybrid ferromagnetic/ferrimagnetic multilayers
• Dynamics of domain walls motion driven by spin-orbit torque in antiferromagnets
• Current-Driven Dynamics of Frustrated Skyrmions in a Synthetic Antiferromagnetic Bilayer
• Homochiral antiferromagnetic merons, antimerons and bimerons realized in synthetic antiferromagnets
• Current-induced dynamics of skyrmion tubes in synthetic antiferromagnetic multilayers
• Micromagnetic understanding of the skyrmion Hall angle current dependence in perpendicular magnetized ferromagnets
• Disclosing the nature of asymmetric interface magnetism in Co/Pt multilayers
• Material systems for FM-/AFM-coupled skyrmions in Co/Pt-based multilayers
• Temporal Memory with Magnetic Racetracks
• Configurable pixelated skyrmions on nanoscale magnetic grids
• Direct observation of Néel-type skyrmions and domain walls in a ferrimagnetic DyCo${}_3$ thin film
• Controlled anisotropic dynamics of tightly bound skyrmions in a synthetic ferrimagnet due to skyrmion-deformation mediated by induced uniaxial in-plane anisotropy
• Robust and programmable logic-in-memory devices exploiting skyrmion confinement and channeling using local energy barriers
• Traps for pinning and scattering of antiferromagnetic skyrmions via magnetic properties engineering
• Spin-orbit torques in a Rashba honeycomb antiferromagnet
• Suppression of the skyrmion Hall effect in synthetic ferrimagnets with gradient magnetization
• Role of magnetic skyrmions for the solution of the shortest path problem
• A spin model for intrinsic antiferromagnetic skyrmions on a triangular lattice
• Nano-engineering the evolution of skyrmion crystal in synthetic antiferromagnets
• Tuning the coexistence regime of incomplete and tubular skyrmions in ferro/ferri/ferromagnetic trilayers
• Topological transport of vorticity on curved magnetic membranes
• Topological Aspects of Antiferromagnets
• The relation between the radii and the densities of magnetic skyrmions
• Nanoscale control of perpendicular magnetic anisotropy, interfacial Dzyaloshinskii-Moriya interaction and skyrmions in the inversion-symmetry-broken Ru/Co/W/Ru films
• Beyond conventional skyrmions in synthetic antiferromagnets
• Crescent domain-wall pairs in anisotropic two-dimensional MnOI monolayer with fast dynamics