Precessional one-dimensional solitons in antiferromagnets with low dynamic symmetry

The nonlinear internal dynamics of one-dimensional topological magnetic solitons in antiferromagnets were studied theoretically, taking into consideration their real magnetic symmetry. The presence of the Dzyaloshinskii-Moriya interaction, which can lead to the appearance of weak non-collinearity of the antiferromagnet sublattices, results in a lowering in the dynamic symmetry of the magnet. As a consequence, there appear the effects of lowering the symmetry of the soliton with internal precession dynamics: precession of the spins becomes inhomogeneous in time and it is accompanied by oscillations of the soliton center. In a certain frequency range, the effects of short-wave magnon radiation are also possible. Published by AIP Publishing.