Dynamics of antiferromagnetic vortices in the domain wall of canted antiferromagnet-yttrium orthoferrite

Abstract Dynamics of antiferromagnetic vortices accompanied by solitary deflection waves in domain walls of yttrium orthoferrite was investigated experimentally using real time two-fold high-speed digital photography. It was shown the dynamics is quasi-relativistic with the limiting velocity of 20 km/s equal to spin-wave velocity on a linear part of its dispersion curve. It was shown that the dynamics is of gyroscopic origin. Effective magnetic field violating Lorenz–invariance dynamics is much greater than it was predicted theoretically.