Three-Dimensional Chiral Magnetization Structures in FeGe Nanospheres
arXiv:2007.05939 · doi:10.1103/PhysRevB.103.104414
Abstract
Skyrmions, spin spirals, and other chiral magnetization structures developing in materials with intrinsic Dzyaloshinsky-Moriya Interaction display unique properties that have been the subject of intense research in thin-film geometries. Here we study the formation of three-dimensional chiral magnetization structures in FeGe nanospheres by means of micromagnetic finite-element simulations. In spite of the deep sub-micron particle size, we find a surprisingly large number of distinct equilibrium states, namely, helical, meron, skyrmion, chiral-bobber and quasi-saturation state. The distribution of these states is summarized in a phase diagram displaying the ground state as a function of the external field and particle radius. This unusual multiplicity of possible magnetization states in individual nanoparticles could be a useful feature for multi-state memory devices. We also show that the magneto-dipolar interaction is almost negligible in these systems, which suggests that the particles could be arranged at high density without experiencing unwanted coupling.
9 pages, 9 figures
References in corpus (21)
- Skyrmion Lattice in a Chiral Magnet
- Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction
- Experimental observation of magnetic bobbers for a new concept of magnetic solid-state memory
- New type of stable particle like states in chiral magnets (Chiral bobbers)
- Magnetic structures and reorientation transitions in noncentrosymmetric uniaxial antiferromagnets
- Direct imaging of a zero-field target skyrmion and its polarity switch in a chiral magnetic nanodisk
- Ground state search, hysteretic behaviour, and reversal mechanism of skyrmionic textures in confined helimagnetic nanostructures
- Compact Skyrmions, Merons and Bimerons in Thin Chiral Magnetic Films
- Three-dimensional skyrmion states in thin films of cubic helimagnets
- Odeint - Solving ordinary differential equations in C++
- Direct-write of free-form 3D nanostructures with controlled magnetic frustration
- Layer-by-layer growth of complex-shaped three-dimensional nanostructures with focused electron beams
- New spiral state and skyrmion lattice in 3D model of chiral magnets
- Confinement of Chiral Magnetic Modulations in the Precursor Region of FeGe
- Multiscale and multimodel simulation of Bloch point dynamics
- Proposal for a micromagnetic standard problem for materials with Dzyaloshinskii-Moriya interaction
- Bloch Point Structure in a Magnetic Nanosphere
- Observation of Magnetic Radial Vortex Nucleation in a Multilayer Stack with Tunable Anisotropy
- Convergent tangent plane integrators for the simulation of chiral magnetic skyrmion dynamics
- Kelvin modes of a skyrmion line in chiral magnets and the associated magnon transport
- Large-scale magnetostatic field calculation in finite element micromagnetics with H2-matrices
Cited by in corpus (7)
- Stress-Induced Phase Transitions in Nanoscale CuInPS
- Chiral Polarization Textures Induced by the Flexoelectric Effect in Ferroelectric Nanocylinders
- Magnetic neutron scattering from spherical nanoparticles with Neel surface anisotropy: Atomistic simulations
- Micromagnetic simulation of neutron scattering from spherical nanoparticles: Effect of pore-type defects
- Magnetic neutron scattering from spherical nanoparticles with Neel surface anisotropy: Analytical treatment
- Bloch point nanospheres for the design of magnetic traps
- Regularized Micromagnetic Theory for Bloch Points