  A type of vortex spin texture with skyrmionic core and a series of circle
spin stripes was obtained in thin nanodisk of the chiral magnets with
Dzyaloshinskii-Moriya interaction and uniaxial anisotropy by means of
micromagnetic approach and Monte Carlo simulation. The size of skyrmionic core
can be modulated continuously by controlling the disk size. Moreover, in some
certain values of the disk size, this vortex state may be spontaneous ground
state even without the help of the external magnetic field and thermal
fluctuation. 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.
