  The present work studies the Ghatak-Sherrington (GS) model in the presence of
a magnetic random field (RF). Previous results obtained from GS model without
RF suggest that disorder and frustration are the key ingredients to produce
spontaneous inverse freezing (IF). However, in this model, the effects of
disorder and frustration always appear combined. In that sense, the
introduction of RF allows us to study the IF under the effects of a disorder
which is not a source of frustration. The problem is solved within the one step
replica symmetry approximation. The results show that the first order
transition between the spin glass and the paramagnetic phases, which is related
to the IF for a certain range of crystal field $D$, is gradually suppressed
when the RF is increased.
