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

Abstract

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 $N\le 100$. 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.

7 pages, 7 figures

References in corpus (7)

• Current-driven vortex oscillations in metallic nanocontacts
• Dipolar interaction between two-dimensional magnetic particles
• Excitation of spin dynamics by spin-polarized current in vortex state disks
• Collective modes for an array of magnetic dots in the vortex state
• Core-Core Dynamics in Spin Vortex Pairs
• Ultrafast dynamics of a magnetic antivortex - Micromagnetic simulations
• Thermal vortex dynamics in thin circular ferromagnetic nanodisks

Cited by in corpus (1)

• Self-organization of topological defects for a triangular-lattice magnetic dots array subject to a perpendicular magnetic field