  The properties of spin polarized neutron matter are studied both at zero and
finite temperature using the D1 and the D1P parameterizations of the Gogny
interaction. The results show two different behaviors: whereas the D1P force
exhibits a ferromagnetic transition at a density of $\rho_c \sim 1.31$
fm$^{-3}$ whose onset increases with temperature, no sign of such a transition
is found for D1 at any density and temperature, in agreement with recent
microscopic calculations.
