Magnetic vortex with skyrmionic core in a thin nanodisk of chiral magnets

A type of vortex spin texture with skyrmionic core and a series of circle spin stripes were obtained in a thin nanodisk of the chiral magnets with Dzyaloshinskii-Moriya interaction and uniaxial anisotropy by means of the micromagnetic approach and Monte Carlo simulation. The size of the skyrmionic core can be modulated continuously by controlling the disk size. Moreover, for some values of the disk size, this vortex state may be a spontaneous ground state even without the help of the external magnetic field and thermal fluctuations. In addition, the-uniaxial anisotropy is able to stabilize this vortex spin texture. We anticipate that the present work will inspire further experimental studies for exploring the spin structure.