Dynamics of domain walls motion driven by spin-orbit torque in antiferromagnets

Abstract

Ultrafast dynamics of antiferromagnetic materials is an appealing feature for novel spintronic devices. Several experiments have shown that both, the static states and the dynamical behavior of the antiferromagnetic order, are strictly related to stabilization of domains and domain wall (DW) motion. Hence for a quantitative understanding of statics and dynamics of multidomain states in antiferromagnetic materials a full micromagnetic framework is necessary. Here, we use this model to study the antiferromagnetic DW motion driven by the spin-orbit torque. The main result is the derivation of analytical expressions for the DW width and velocity that exhibit a very good agreement with the numerical simulations in a wide range of parameters. We also find that a mechanism limiting the maximum applicable current in an antiferromagnetic racetrack memory is the continuous nucleation of the domains from the edge, which is qualitatively different from what is observed in ferromagnetic racetracks.

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• Boris Computational Spintronics -- High Performance Multi-Mesh Magnetic and Spin Transport Modelling Software
• Identification of Néel vector orientation in antiferromagnetic domains switched by currents in NiO/Pt thin films
• Spin-Torque-driven Terahertz Auto Oscillations in Non-Collinear Coplanar Antiferromagnets
• Emergence of Transient Domain Wall Skyrmions after Ultrafast Demagnetisation
• Spin-Hall nanooscillator based on an antiferromagnetic domain wall
• Handedness-filter and Doppler shift of spin waves in ferrimagnetic domain walls
• Domain periodicity in an easy-plane antiferromagnet with Dzyaloshinskii-Moriya interaction
• Voltage-Induced Inertial Domain Wall Motion in an Antiferromagnetic Nanowire
• Level attraction and exceptional points in a resonant spin-orbit torque system
• Boundary conditions for the Néel order parameter in a chiral antiferromagnetic slab
• Novel interpretation of recent experiments on the dynamics of domain walls along ferrimagnetic strips
• Compensated magnetic insulators for extremely fast spin-orbitronics
• Identifiying the domain wall spin structure in current-induced switching of antiferromagnetic NiO/Pt
• Dynamics of domain walls in curved antiferromagnetic wires
• Analytical model of the inertial dynamics of a magnetic vortex
• Analytical dispersion relation for forward volume spin waves in ferrimagnets near the angular momentum compensation condition
• Vortex propagation and phase transitions in a chiral antiferromagnetic nanostripe