  The dynamics of a multiferroic domain wall in which an electric field can
couple to the magnetization via inhomogeneous magnetoelectric interaction is
investigated by the collective-coordinate framework. We show how the electric
field is capable of delaying the onset of the Walker breakdown of the domain
wall motion, leading to a significant enhancement of the maximum wall velocity.
Moreover, we show that in the stationary regime the chirality of the domain
wall can be efficiently reversed when the electric field is applied along the
direction of the magnetic field. These characteristics suggest that the
multiferroic domain wall may provide a new prospective means to design faster
and low-power-consumption domain wall devices.
