Observation of compact ferrimagnetic skyrmions in DyCo film
arXiv:2008.00725
Abstract
Owing to the experimental discovery of magnetic skyrmions stabilized by the Dzyaloshinskii-Moriya and/or dipolar interactions in thin films, there is a recent upsurge of interest in magnetic skyrmions with antiferromagnetic spins in order to overcome the fundamental limitations inherent with skyrmions in ferromagnetic materials. Here, we report on the observation of compact ferrimagnetic skyrmions for the class of amorphous alloys consisting of 4f rare-earth and 3d transition-metal elements with perpendicular magnetic anisotropy, using a DyCo film, that are identified by combining x-ray magnetic scattering, scanning transmission x-ray microscopy, and Hall transport technique. These skyrmions, with antiparallel aligned Dy and Co magnetic moments and a characteristic core radius of about 40~nm, are formed during the nucleation and annihilation of the magnetic maze-like domain pattern exhibiting a topological Hall effect contribution. Our findings provide a promising route for fundamental research in the field of ferrimagnetic/antiferromagnetic spintronics towards practical applications.
arXiv comment7 pages, 4 figures
References in corpus (23)
- Skyrmion Lattice in a Chiral Magnet
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Spontaneous Skyrmion Ground States in Magnetic Metals
- Observation of room temperature magnetic skyrmions and their current-driven dynamics in ultrathin Co films
- Topological Hall effect in the A-phase of MnSi
- Spin Transfer Torques in MnSi at Ultra-low Current Densities
- Direct Observation of the Skyrmion Hall Effect
- Room temperature chiral magnetic skyrmion in ultrathin magnetic nanostructures
- Static and Dynamical Properties of Antiferromagnetic Skyrmions in the Presence of Applied Current and Temperature
- Magnetic bilayer-skyrmions without skyrmion Hall effect
- Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films
- A theory on skyrmion size and profile
- Current-induced skyrmion generation and dynamics in symmetric bilayers
- Significant Dzyaloshinskii-Moriya Interaction at Graphene-Ferromagnet Interfaces due to Rashba-effect
- Spin-orbit torque-driven skyrmion dynamics revealed by time-resolved X-ray microscopy
- Compact Skyrmions, Merons and Bimerons in Thin Chiral Magnetic Films
- Giant topological Hall effect in correlated oxide thin films
- Curvature effects in statics and dynamics of low dimensional magnets
- Topologically stable magnetization states on a spherical shell: curvature stabilized skyrmions
- Driven skyrmions and dynamical transitions in chiral magnets
- Scattering mechanisms in textured FeGe thin films: magnetoresistance and the anomalous Hall effect
- Terahertz spin currents and inverse spin Hall effect in thin-film heterostructures containing complex magnetic compounds
- Unraveling the role of dipolar versus Dzyaloshinskii-Moriya interaction in stabilizing compact magnetic skyrmions