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

High Magnetic Field Laboratory, Chinese Academy of Science - Hefei 230031, Anhui, PRC and Hefei National Laboratory for Physical Science at The Microscale, University of Science and Technology of China Hefei 230026, PRC

^(a) Present address: Hefei Institutes of Physical Science, CAS - Hefei 230031, PRC; tianml@hmfl.ac.cn

Received: 24 October 2012
Accepted: 18 January 2013

Abstract

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.