# Vortex ground state for small arrays of magnetic particles with dipole coupling

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We show that a magnetic vortex is the ground state of an array of magnetic particles shaped as a hexagonal fragment of a triangular lattice, even for an small number of particles in the array $N \leq 100$. The vortex core appears and the symmetry of the vortex state changes with the increase of the intrinsic magnetic anisotropy of the particle $\beta$; the further increase of $\beta$ leads to the destruction of the vortex state. Such vortices can be present in arrays as small in size as dozen of nanometers.

Autor: S. A. Dzian; A. Yu. Galkin; B. A. Ivanov; V. E. Kireev; V. M. Muravyov

Fuente: https://archive.org/