We study numerically the one dimensional ferromagnetic Kondo lattice, a mod
el widely used to describe nickel and manganese perovskites. By including a
nearest-neighbor Coulomb interaction (V) and a superexchange interaction b
etween the localized moments (K), we obtain the phase diagram in parameter
space for several dopings at T = 0. Because of the competition between doub
le and superexchange, we find a region where the formation of magnetic pola
rons induces a charge-ordered state which survives also for V = 0. This mec
hanism should be taken into account in theories of charge ordering involvin
g spin degrees of freedom.