Planar lattices of magnetic nanoparticles with antiferromagnetic interaction

Square lattices of magnetic nanoparticles undergoing dipole–dipole and antiferromagnetic exchange interactions have been investigated. The main types of equilibrium states with zero and nonzero total magnetic moments have been revealed. It is shown that transitions between different equilibrium states may occur by means of a uniform magnetic field due to the presence of configuration bistability. Orientational transitions between equilibrium states under the action of a magnetic-field pulse on the system and transient oscillation processes have been studied.