  The phenomena of exchange anisotropy is well known in terms of static
magnetization properties such as enhanced coercivity and magnetization loop
shifts. These effects are primarily associated with effective anisotropies
introduced into the ferromagnet by exchange coupling with a strongly
anisotropic antiferromagnet. These effective anisotropies can be understood as
manifestations of a more fundamental exchange induced susceptibility. We show
that a consequence of this view is that a class of unusual dynamic effects
associated with the exchange susceptibility should also exist. The effects
become apparent near the ordering temperature of the antiferromagnet and affect
domain wall velocities, domain wall resonances, and precessional switching of
the ferromagnet.
