  We investigate magnetic domain wall (MDW) dynamics induced by applied
electric fields in ferromagnetic-ferroelectric thin-film heterostructures. In
contrast to conventional driving mechanisms where MDW motion is induced
directly by magnetic fields or electric currents, MDW motion arises here as a
result of strong pinning of MDWs onto ferroelectric domain walls (FDWs) via
local strain coupling. By performing extensive micromagnetic simulations, we
find several dynamical regimes, including instabilities such as spin wave
emission and complex transformations of the MDW structure. In all cases, the
time-averaged MDW velocity equals that of the FDW, indicating the absence of
Walker breakdown.
