Solitons in isotropic antiferromagnets: beyond the sigma model

Isotropic antiferromagnets display a rich variety of magnetic solitons with nontrivial static and dynamic properties. One-dimensional soliton elementary excitations have a periodic dispersion law. For the two-dimensional case, planar antiferromagnetic vortices having a nonsingular macroscopic core with a saturated magnetic moment are present. The dynamic properties of these planar antiferromagnetic vortices are characterized by the presence of a gyroforce.