Bi-stability of magnetic skyrmions in ultrathin multilayer nanodots induced by magnetostatic interaction
arXiv:1708.01149 · doi:10.1002/pssr.201700259
Abstract
We report the results of simulations of magnetic skyrmion stability in ultrathin magnetic multilayer nanodots with interfacial Dzyaloshinskii-Moriya exchange interaction (DMI). We found that in presence of the lateral confinement the magnetostatic energy significantly influences the skyrmion stability and leads to stabilization of large radius skyrmion even at low values of the DMI strength, in addition to small radius skyrmion stabilized by DMI. In particular, stabilization of the skyrmion state with two different radii (bi-stability) is found in dipolarly-coupled (Pt/Co/Ir) circular nanodots with the number of repeats of the unit cell = 3 and 5. The bi-stability range is located at the DMI strength of 0.9-1.1 mJ/m or at the total Co-layer thickness of 2.2-2.6 nm.
References in corpus (16)
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Skyrmions at room temperature : From magnetic thin films to magnetic multilayers
- Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
- Room temperature chiral magnetic skyrmion in ultrathin magnetic nanostructures
- Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction
- Chiral skyrmions in thin magnetic films: new objects for magnetic storage technologies?
- The properties of isolated chiral skyrmions in thin magnetic films
- Observation of stable Neel skyrmions in Co/Pd multilayers with Lorentz transmission electron microscopy
- MuMax: a new high-performance micromagnetic simulation tool
- Ground state search, hysteretic behaviour, and reversal mechanism of skyrmionic textures in confined helimagnetic nanostructures
- Spin-Wave Spectrum in Magnetic Nanodot with Continuous Transition between Vortex, Bloch-type Skyrmion and Néel-type Skyrmion States
- Field-Driven Evolution of Chiral Spin Textures in Thin Nanodisk of the Helimagnets
- Target-skyrmions and skyrmion clusters in nanowires of chiral magnets
- Theory of vortex states in magnetic nanodisks with induced Dzyaloshinskii-Moriya interactions
- Magnetic Vortex with Skyrmionic Core in Thin Nanodisk of the Chiral Magnets
- Stability of Neel skyrmions in ultra-thin nanodots considering Dzyaloshinskii-Moriya and dipolar interactions