DYNAMICS OF THE INTERMEDIATE STATE AND DOMAIN-WALLS IN AN EXTERNAL OSCILLATING MAGNETIC-FIELD

We study the dynamics of 90-degree domain wails in the intermediate st ate of antiferromagnets, the state being realized in a first-order spi n-flop transition in an external magnetic field. We show that an addit ional oscillating external magnetic field leads to a drift in the doma in walls and fired the dependence of the drift velocity on the amplitu de, frequency, and polarization of the oscillating held. Finally, we d iscuss the possibility of the domain structure drifting as a whole. (C ) 1997 American Institute of Physics.