Energetic molding of chiral magnetic bubbles

Abstract

Topologically protected magnetic structures such as skyrmions and domain walls (DWs) have drawn a great deal of attention recently due to their thermal stability and potential for manipulation by spin current, which is the result of chiral magnetic configurations induced by the interfacial Dzyaloshinskii-Moriya Interaction (DMI). Designing devices that incorporate DMI necessitates a thorough understanding of how the interaction presents and can be measured. One approach is to measure growth asymmetry of chiral bubble domains in perpendicularly magnetized thin films, which has been described elsewhere by thermally activated DW motion. Here, we demonstrate that the anisotropic angular dependence of DW energy originating from the DMI is critical to understanding this behavior. Domains in Co/Ni multi-layers are observed to preferentially grow into non-elliptical teardrop shapes, which vary with the magnitude of an applied in-plane field. We model the domain profile using energetic calculations of equilibrium shape via the Wulff construction, which explains both the teardrop shape and the reversal of growth symmetry at large fields.

References in corpus (14)

• Current-driven dynamics of chiral ferromagnetic domain walls
• Observation of room temperature magnetic skyrmions and their current-driven dynamics in ultrathin Co films
• Blowing Magnetic Skyrmion Bubbles
• Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
• Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction
• Anatomy of Dzyaloshinskii-Moriya Interaction at Co/Pt Interfaces
• Asymmetric Magnetic Domain-Wall Motion by the Dzyaloshinskii-Moriya Interaction
• Chirality-induced asymmetric magnetic nucleation in Pt/Co/AlOx ultrathin microstructures
• Soliton-like magnetic domain wall motion induced by the interfacial Dzyaloshinskii-Moriya interaction
• Asymmetric magnetic bubble expansion under in-plane field in Pt/Co/Pt: effect of interface engineering
• Chiral damping of magnetic domain walls
• Velocity asymmetry of Dzyaloshinskii domain walls in the creep and flow regimes
• Shape of domains in two-dimensional systems: virtual singularities and a generalized Wulff construction
• Boojums and the Shapes of Domains in Monolayer Films

Cited by in corpus (27)

• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Skyrmions in Magnetic Multilayers
• Effect of interfacial intermixing on the Dzyaloshinskii-Moriya interaction in Pt/Co/Pt
• Asymmetric hysteresis for probing Dzyaloshinskii-Moriya interaction
• Domain Wall Motion and Interfacial Dzyaloshinskii-Moriya Interactions in Pt/Co/Ir$(t_{\mathrm{Ir}})$/Ta Multilayers
• Dispersive Stiffness of Dzyaloshinskii Domain Walls
• Magnetic properties, domain wall creep motion and the Dzyaloshinskii-Moriya interaction in Pt/Co/Ir thin films
• Disentangling factors governing Dzyaloshinskii domain wall creep in Co/Ni thin films using Pt${}_x$Ir${}_{1-x}$ seedlayers
• Quantitative agreement of Dzyaloshinskii-Moriya interactions for domain-wall motion and spin-wave propagation
• Creep of Chiral Domain Walls
• Magnetic Domain-Wall Tilting due to Domain-Wall Speed Asymmetry
• Asymmetric velocity and tilt angle of domain walls induced by spin-orbit torques
• Lorentz TEM investigation of chiral spin textures and Néel Skyrmions in asymmetric [Pt/(Co/Ni)${}_M$/Ir]${}_N$ multi-layer thin films
• Strength and length-scale of the interaction between domain walls and pinning disorder in thin ferromagnetic films
• Chirality-Induced Noncollinear Magnetization and Asymmetric Domain-Wall Propagation in Hydrogenated CoPd Thin Films
• Key points in the determination of the interfacial Dzyaloshinskii-Moriya interaction from asymmetric bubble domain expansion
• Dynamic symmetry breaking in chiral magnetic systems
• The determination of the Dzyaloshinskii-Moriya interaction in exchange biased Au/Co/NiO system
• Highly anisotropic magnetic domain wall behavior in-plane magnetic films
• Asymmetric depinning of chiral domain walls in ferromagnetic trilayers
• Dynamics and morphology of chiral magnetic bubbles in perpendicularly magnetized ultra-thin films
• Chiral magnetic domain walls under transverse fields: a semi-analytical model
• Nonreciprocal flexural dynamics of Dzyaloshinskii domain walls
• Magnetic Nanohorns for measurement of the interfacial Dzyaloshinskii-Moriya interaction: A micromagnetic study
• Effect of Ir growth pressure on the domain wall dynamics in Ta/Pt/Co/Ir/Ta stacks
• Chirality-induced Antisymmetry in Magnetic Domain-Wall Speed
• Angle-dependence and optimal design for magnetic bubblecade with maximum speed