Nano-scale magnetic skyrmions and target states in confined geometries
arXiv:1901.06999 · doi:10.1103/PhysRevB.99.214408
Abstract
Research on magnetic systems with broken inversion symmetry has been stimulated by the experimental proof of particle-like configurations known as skyrmions, whose non-trivial topological properties make them ideal candidates for spintronic technology. This class of materials enables Dzyaloshinskii-Moriya interactions (DMI) which favor the stabilization of chiral configurations. Recent advances in material engineering have shown that in confined geometries it is possible to stabilize skyrmionic configurations at zero field. Moreover, it has been shown that in systems based on Pd/Fe bilayers on top of Ir(111) surfaces skyrmions can be as small as a few nanometres in diameter. In this work we present scanning tunneling microscopy measurements of small Pd/Fe and Pd/Fe islands on Ir(111) that exhibit a variety of different spin textures, which can be reproduced using discrete spin simulations. These configurations include skyrmions and skyrmion-like states with extra spin rotations such as the target state, which have been of interest due to their promising dynamic properties. Furthermore, using simulations we analyze the stability of these skyrmionic textures as a function of island size, applied field and boundary conditions of the system. An understanding of the parameters and conditions affecting the stability of these magnetic structures in confined geometries is crucial for the development of energetically efficient and optimally sized skyrmion-based devices.
arXiv comment20 pages, 13 figures, Supplemental Material 16 pages
References in corpus (29)
- Skyrmion Lattice in a Chiral Magnet
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Spontaneous Skyrmion Ground States in Magnetic Metals
- Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction
- Field-Dependent Size and Shape of Single Magnetic Skyrmions
- Chiral skyrmions in thin magnetic films: new objects for magnetic storage technologies?
- A theory on skyrmion size and profile
- Electric field driven switching of individual magnetic skyrmions
- The properties of isolated chiral skyrmions in thin magnetic films
- Laser-Induced Magnetic Nanostructures with Tunable Topological Properties
- Control and manipulation of a magnetic skyrmionium in nanostructures
- Electrical detection of magnetic skyrmions by non-collinear magnetoresistance
- Direct imaging of a zero-field target skyrmion and its polarity switch in a chiral magnetic nanodisk
- Method for finding mechanism and activation energy of magnetic transitions, applied to skyrmion and antivortex annihilation
- Ground state search, hysteretic behaviour, and reversal mechanism of skyrmionic textures in confined helimagnetic nanostructures
- Thermal stability and topological protection of skyrmions in nanotracks
- Skyrmion dynamics in chiral ferromagnets
- Chiral Magnetic Skyrmions with Arbitrary Topological Charge ("skyrmionic sacks")
- Topological Charge Analysis of Ultrafast Single Skyrmion Creation
- Sub-100 nm Skyrmions at Zero Magnetic Field in Ir/Fe/Co/Pt Nanostructures
- Paths to collapse for isolated skyrmions in few-monolayer ferromagnetic films
- Skyrmion lifetimes in ultrathin films
- Target-skyrmions and skyrmion clusters in nanowires of chiral magnets
- Dynamics of a magnetic skyrmionium driven by spin waves
- Controlled creation and stability of kπ-skyrmions on a discrete lattice
- Fidimag -- a finite difference atomistic and micromagnetic simulation package
- Cycloidal versus skyrmionic states in mesoscopic chiral magnets
- Skyrmion states in thin confined polygonal nanostructures
- Hysteresis of nanocylinders with Dzyaloshinskii-Moriya interaction
Cited by in corpus (16)
- Beyond skyrmions: Review and perspectives of alternative magnetic quasiparticles
- Topological superconductivity with deformable magnetic skyrmions
- Dynamic Excitations of Chiral Magnetic Textures
- Field-driven metamorphoses of isolated skyrmions within the conical state of cubic helimagnets
- Atomic scale visualization of topological spin textures in the chiral magnet MnGe
- Towards skyrmion-superconductor hybrid systems
- Zero-field skyrmionic states and in-field edge-skyrmions induced by boundary tuning
- Particle-continuum-medium duality of skyrmions
- Nematic and smectic stripe phases and stripe-SkX transformations
- Reduced energies for thin ferromagnetic films with perpendicular anisotropy
- Effects of interlayer exchange on collapse mechanisms and stability of magnetic skyrmions
- Theory of magnetic field-stabilized compact skyrmions in thin film ferromagnets
- Magnetic skyrmions under confinement
- Deformation of a Néel-type Skyrmion in a Weak Inhomogeneous Magnetic Field: Magnetization Ansatz and Interaction with a Pearl Vortex
- Thermally Activated Transitions Between Micromagnetic States
- Strain-driven domain wall network with chiral junctions in an antiferromagnet