  We study a two-sublattice Ising metamagnet with nearest and
next-nearest-neighbor interactions, in both uniform and random fields. Using a
mean-field approximation, we show that the qualitative features of the phase
diagrams are significantly dependent on the distribution of the random fields.
In particular, for a Gaussian distribution of random fields, the behavior of
the model is qualitatively similar to a dilute Ising metamagnet in a uniform
field.
