![]() In such systems, skyrmions usually crystallize into a close-packed triangular-lattice form in the equilibrium condition (Fig. These compounds are characterized by the chiral cubic crystal structure, where Dzyaloshinskii–Moriya (DM) interaction plays a key role in the stabilization of the skyrmion spin texture. These results demonstrate that the size/shape degree of freedom of skyrmion particle is an important factor to determine their stable lattice form, revealing the exotic manner of phase transition process for topological soliton ensembles in the non-equilibrium condition.Įxperimentally, magnetic skyrmions are found in a series of noncentrosymmetric systems, such as metallic B20 (MnSi, FeGe, Fe 1− xCo xSi, etc.) 3, 4, 6, Co-Zn-Mn alloys 12, and insulating Cu 2OSeO 3 13, 14. Such internal deformation of skyrmion particle has further been confirmed by probing the higher harmonics in the RSXS pattern. Our simulation suggests that the symmetry change of metastable SkL is mainly triggered by the B-induced modification of skyrmion core diameter and associated energy cost at the skyrmion-skyrmion interface region. ![]() This compound is found to undergo a triangular-to-square lattice transformation of metastable skyrmions by sweeping magnetic field ( B). Here, we investigated the detailed mechanism of structural transition of skyrmion lattice (SkL) in a prototype chiral cubic magnet Cu 2OSeO 3, by combining resonant soft X-ray scattering (RSXS) experiment and micromagnetic simulation. The size and shape of skyrmion particles can be flexibly controlled by external stimuli, which suggests unique features of their crystallization and lattice transformation process. Magnetic skyrmion is a topologically protected particle-like object in magnetic materials, appearing as a nanometric swirling spin texture.
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