Quasirelativistic, gyroscopic dynamics of antiferromagnetic vortices on quasirelativistic domain wall of an yttrium orthoferrite

Dynamics of antiferromagnetic vortices accompanied by solitary deflection waves on moving domain wall of an yttrium orthoferrite was investigated experimentally using real time two-fold high speed digital photography. The dynamics is quasirelativistic, gyroscopic with the limiting velocity c=20km/s equal to the spin-wave velocity on a linear part of its dispersion curve.