Fizika Nizkikh Temperatur: Volume 43, Number 11 (November 2017), p. 1609-1617    ( to contents , go back )

Precessional single-dimensional solitons in antiferromagnets with low-dynamic symmetry

E.G. Galkina1, R.V. Оvcharov2, and B.A. Ivanov2,3,4

1Institute of Physics of the National Academy of Sciences 46 Nauki Ave., Kiev 03028, Ukraine

2National Taras Shevchenko University of Kiev, Kiev 03127, Ukraine

3Institute of Magnetism, NASU, 36-B Vernadskii Ave., Kiev 03142, Ukraine

4National University of Science and Technology “MISiS”, Moscow 119049, Russia
E-mail: bor.a.ivanov@gmail.com

Received Jule 12, 2017

Abstract

The nonlinear internal dynamics of one-dimensional topological magnetic solitons in antiferromagnets with accounting for their real magnetic symmetry is studied theoretically. The presence of the Dzyaloshinsky–Moriya interaction, which can lead to the appearance of weak canting of the sublattices of the antiferromagnet, leads to a lowering in the dynamic symmetry of the magnet. As a consequence, the effects of lowering the symmetry of the soliton with internal precession dynamics appear: spin precession becomes non-uniform in time and it is accompanied by oscillations of the soliton center. In a certain frequency range, the effect of radiation of short-wave magnons appears.

PACS: 75.10.Hk Classical spin models;
PACS: 75.50.Ee Antiferromagnetics;
PACS: 05.45.Yv Solitons.

Key words: antiferromagnets, magnetic solitons, Dzyaloshinskii–Moriya interaction, spintronics.

Published online:: September 25, 2017

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