  We have studied magnetic ordering in ferro/antiferromagnetic (F/AF) bilayers
using Monte Carlo simulations of classical Heisenberg spins. For both flat and
stepped interfaces we observed order in the AF above the Neel temperature, with
the AF spins aligning collinearly with the F moments. In the case of the
stepped interface there is a transition from collinear to perpendicular
alignment of the F and AF spins at a lower temperature.
