Haifeng Du, Wei Ning, Mingliang Tian, Yuheng Zhang
A type of vortex spin texture with skyrmionic core and a series of circle spin stripes was obtained in thin nanodisk of chiral magnets with Dzyaloshinskii-Moriya interaction and uniaxial anisotropy by means of micromagnetic approach and Monte Carlo simulation. Both the size of skyrmionic core and chirality 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, uniaxial anisotropy is able to stabilize this vortex texture. We anticipate that the present work will inspire further experimental studies for exploring such a novel spin structure, which perhaps favor the application in nanoscale spintronic device.
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http://arxiv.org/abs/1210.2862
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