Low Temperature Physics: 36, 826 (2010); https://doi.org/10.1063/1.3493431 (5 pages)
Fizika Nizkikh Temperatur: Volume 36, Number 8-9 (August 2010), p. 1034-1040    ( to contents , go back )

Magnus force and inertia properties of magnetic vertices in weak ferromagnets

A.K. Zvezdin and K.A. Zvezdin

A.M. Prokhorov General Physics Institute of RAS, 38 Vavilov Str., Moscow 119991, Russia
E-mail: zvezdin@gmail.com; konstantin.zvezdin@gmail.com

Received March 29, 2010

Abstract

The question of the Magnus force in weak ferromagnets acting on magnetic vortices (Bloch lines), within domain boundary has been investigated and the general formula of the Magnus force has been derived. It is shown that the Magnus force is non-zero in most types domain boundaries and determined by the average sublattice magnetization, Dzyaloshinskii coupling constants and exchange interaction between the sublattices. Generalized expressions have been obtained for the effective Langrangian and Rayleigh functions in weak ferromagnets allowing for their vortex structure. The mass of a vortex was considered and the value m* ~ 10–14 g/сm was obtained for YFeO3. The dynamic bending of the domain boundary in the presence of a moving vortex has been analyzed. A formula has been obtained, which describes the dependence of the vortex velocity in a motionless domain boundary upon the magnetic-field.

PACS: 75.10.–b General theory and models of magnetic ordering.

Key words: Magnus force, magnetic vortex, weak ferromagnetism, domain boundary.

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