Three-Dimensional Chiral Magnetization Structures in FeGe Nanospheres - Archive ouverte HAL
Article Dans Une Revue Physical Review B Année : 2021

Three-Dimensional Chiral Magnetization Structures in FeGe Nanospheres

Résumé

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.

Dates et versions

hal-03095535 , version 1 (04-01-2021)

Identifiants

Citer

Swapneel Amit Pathak, Riccardo Hertel. Three-Dimensional Chiral Magnetization Structures in FeGe Nanospheres. Physical Review B, 2021, 103, pp.104414. ⟨10.1103/PhysRevB.103.104414⟩. ⟨hal-03095535⟩
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