  We calculate the dc Josephson current for two superconductor-ferromagnet
(S/F) bilayers separated by a thin insulating film. It is demonstrated that the
critical Josephson current $I_{c}$ in the junction strongly depends on the
relative orientation of the effective exchange field $h$ of the bilayers. We
found that in the case of an antiparallel orientation, $I_{c}$ increases at low
temperatures with increasing $h$ and at zero temperature has a singularity when
$h$ equals the superconducting gap $\Delta $. This striking behavior contrasts
suppression of the critical current by the magnetic moments aligned in parallel
and is an interesting new effect of the interplay between superconductors and
ferromagnets.
