Current-Driven Domain Wall Motion in Curved Ferrimagnetic Strips Above and Below the Angular Momentum Compensation

Abstract

Current driven domain wall motion in curved Heavy Metal/Ferrimagnetic/Oxide multilayer strips is investigated using systematic micromagnetic simulations which account for spin-orbit coupling phenomena. Domain wall velocity and characteristic relaxation times are studied as functions of the geometry, curvature and width of the strip, at and out of the angular momentum compensation. Results show that domain walls can propagate faster and without a significant distortion in such strips in contrast to their ferromagnetic counterparts. Using an artificial system based on a straight strip with an equivalent current density distribution, we can discern its influence on the wall terminal velocity, as part of a more general geometrical influence due to the curved shape. Curved and narrow ferrimagnetic strips are promising candidates for designing high speed and fast response spintronic circuitry based on current-driven domain wall motion.

References in corpus (9)

• Current-driven dynamics of chiral ferromagnetic domain walls
• Domain wall motion governed by the spin Hall effect
• Staggering antiferromagnetic domain wall velocity in a staggered spin-orbit field
• Current-induced domain wall motion in compensated ferrimagnet
• Observation of current-induced switching in non-collinear antiferromagnetic IrMn${}_3$ by differential voltage measurements
• Tunable inertia of chiral magnetic domain walls
• Current-driven domain wall dynamics in ferrimagnets: micromagnetic approach and collective coordinates model
• Current-driven domain wall dynamics in ferromagnetic layers synthetically exchange-coupled by a spacer: A micromagnetic study
• Domain Wall Motion in Magnetic Nanostrips