Kinks in One-Dimensional Two-Sublattice Antiferromagnet with Biquadratic Exchange Interaction
I.V. Baryakhtar
B.I. Verkin Institute for Temperature Physics and Engineering, 47 Lenin Avenue, Kharkov, 310164, Ukraine
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Nonlinear dynamics of an antiferromagnet in continuum approximation on the basis of the Heisenberg Hamiltonian for two sublattices with biquadratic exchange interaction in each sublattice and single ion anisotropy is considered. Exact particular solution, describing the stationary kink movement, including the region v ≥ c, is found.
DOI: 10.12693/APhysPolA.85.399
PACS numbers: 75.40.Gb, 75.50.Ee