Rashba Torque Driven Domain Wall Motion in Magnetic Helices

Abstract

Manipulation of the domain wall propagation in magnetic wires is a key practical task for a number of devices including racetrack memory and magnetic logic. Recently, curvilinear effects emerged as an efficient mean to impact substantially the statics and dynamics of magnetic textures. Here, we demonstrate that the curvilinear form of the exchange interaction of a magnetic helix results in an effective anisotropy term and Dzyaloshinskii--Moriya interaction with a complete set of Lifshitz invariants for a one-dimensional system. In contrast to their planar counterparts, the geometrically induced modifications of the static magnetic texture of the domain walls in magnetic helices offer unconventional means to control the wall dynamics relying on spin-orbit Rashba torque. The chiral symmetry breaking due to the Dzyaloshinskii-Moriya interaction leads to the opposite directions of the domain wall motion in left- or right-handed helices. Furthermore, for the magnetic helices, the emergent effective anisotropy term and Dzyaloshinskii-Moriya interaction can be attributed to the clear geometrical parameters like curvature and torsion offering intuitive understanding of the complex curvilinear effects in magnetism.

References in corpus (8)

• Anatomy of Dzyaloshinskii-Moriya Interaction at Co/Pt Interfaces
• Matching domain wall configuration and spin-orbit torques for very efficient domain-wall motion
• Current-induced domain wall motion in Rashba spin-orbit system
• Curvature effects in statics and dynamics of low dimensional magnets
• Magnetochiral symmetry breaking in a Möbius ring
• Curvature induced domain wall pinning
• Torsion induced effects in magnetic nanowires
• Spin-Orbit Torques in Two-Dimensional Rashba Ferromagnets

Cited by in corpus (15)

• Two-photon Lithography for 3D Magnetic Nanostructure Fabrication
• Micromagnetic Theory of Curvilinear Ferromagnetic Shells
• Electronic materials with nanoscale curved geometries
• Curvature and torsion effects in the spin-current driven domain wall motion
• Magnetization in narrow ribbons: curvature effects
• Vortex-antivortex pairs induced by curvature in toroidal nanomagnets
• Curvilinear one-dimensional antiferromagnets
• Oscillatory behavior of the domain wall dynamics in a curved cylindrical magnetic nanowire
• Non-planar geometrical effects on the magnetoelectrical signal in a three-dimensional nanomagnetic circuit
• Curvature-driven homogeneous Dzyaloshinskii-Moriya interaction and emergent weak ferromagnetism in anisotropic antiferromagnetic spin chains
• Localization of magnon modes in a curved magnetic nanowire
• Manipulation by magnetic frustration in ferrotoroidal spin chains via curvature and torsion
• Dynamics of domain walls in curved antiferromagnetic wires
• Chiral breakdown engineered by mesoscale Dzyaloshinskii-Moriya interaction in biaxial magnetic nanotubes
• Spin-orbit torque driven motion of chiral domain walls induced by radial magnetization in nanotube geometry