Chiral domain wall dynamics in magnetic heterostructures with bulk Dzyaloshinskii-Moriya interactions

Abstract

In this work, dynamics of chiral domain walls in long and narrow magnetic heterostructures based on non-centrosymmetric chiral magnets with bulk Dzyaloshinskii-Moriya interactions (DMI) and perpendicular magnetic anisotropy is systematically investigated. The driving forces can be out-of-plane magnetic fields and in-plane currents, correspondingly both steady and precessional flows are considered. Their dividing points (the Walker critical field and current density) are obtained as functions of bulk DMI strength ($D_{\mathrm{b}}$) and the ratio ($\kappa$) of total (crystalline plus shape) anisotropy in the hard axis over that in the easy one. When far beyond Walker breakdown, the dependence curve of wall velocity on external in-plane bias field takes parabolic shape around the compensation point where the total in-plane field disappears. The center shift is determined by $D_{\mathrm{b}}$, $\kappa$, and the wall's topological charge, thus can be used to measure the bulk DMI strength in chiral magnets.

arXiv comment9 pages, 4 figures

References in corpus (34)

• Skyrmion Lattice in a Chiral Magnet
• Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
• Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
• Skyrmions in Magnetic Multilayers
• Skyrmion-electronics: Writing, deleting, reading and processing magnetic skyrmions toward spintronic applications
• Skyrmion fractionalization and merons in chiral magnets with easy-plane anisotropy
• Domain wall tilting in the presence of the Dzyaloshinskii-Moriya interaction in out-of-plane magnetized magnetic nanotracks
• Magnetic bimerons as skyrmion analogues in in-plane magnets
• Compact Skyrmions, Merons and Bimerons in Thin Chiral Magnetic Films
• Magnonic frequency comb through nonlinear magnon-skyrmion scattering
• Large Noncollinearity and Spin Reorientation in the Novel Mn2RhSn Heusler Magnet
• Current-Induced Dynamics and Chaos of Antiferromagnetic Bimerons
• Topological insulators and semimetals in classical magnetic systems
• Very large domain wall velocities in Pt/Co/Gd trilayers with Dzyaloshinskii-Moriya interaction
• Unravelling Dzyaloshinskii-Moriya interaction and chiral nature of Graphene/Cobalt interface
• Static and dynamic properties of bimerons in a frustrated ferromagnetic monolayer
• Velocity asymmetry of Dzyaloshinskii domain walls in the creep and flow regimes
• Field-induced domain wall propagation velocity in magnetic nanowires
• Velocity enhancement by synchronization of magnetic domain walls
• Tuning domain wall velocity with Dzyaloshinskii-Moriya interaction
• Modification of Dzyaloshinskii-Moriya interaction stabilized domain wall chirality by driving currents
• Dependence of Dzyaloshinskii-Moriya interaction on the oxygen coverage in Pt/Co/MOx trilayers
• Room temperature tetragonal noncollinear antiferromagnet Pt${}_2$MnGa
• Universality of Dzyaloshinskii-Moriya interaction effect over domain-wall creep and flow regimes
• Magnetic properties and field-driven dynamics of chiral domain walls in epitaxial Pt/Co/Au${}_x$Pt${}_{1-x}$ trilayers
• Statics and field-driven dynamics of transverse domain walls in biaxial nanowires under uniform transverse magnetic fields
• Collective Coordinate Descriptions of Magnetic Domain Wall Motion in Perpendicularly Magnetized Nanostructures under the Application of In-plane Fields
• Universal Absence of Walker Breakdown and Linear Current-Velocity Relation via Spin-Orbit Torques in Coupled and Single Domain Wall Motion
• Determination of the Dzyaloshinskii-Moriya interactions
• Understanding current-driven dynamics of magnetic Néel walls in heavy metal/ferromagnetic metal/oxide trilayers
• Collective Coordinate Models of Domain Wall Motion in Perpendicularly Magnetized Systems under the Spin Hall Effect and Longitudinal Fields
• Ultra-high differential mobility and velocity of Néel walls in spin valves with planar-transverse polarizers under low perpendicularly injected currents
• Survey of 360${}^{\circ }$ domain walls in magnetic heterostructures: topology, chirality and current-driven dynamics
• Stabilizing current-driven steady flows of 180${}^{\circ }$ domain walls in spin valves by interfacial Dzyaloshinskii-Moriya interaction