  The ferromagnetic phase diagram of the periodic Anderson model is calculated
using dynamical mean-field theory in combination with the modified perturbation
theory. Concentrating on the intermediate valence regime, the phase boundaries
are established as function of the total electron density, the position of the
atomic level and the hybridization strength. The main contribution to the
magnetic moment stems from the f-electrons. The conduction band polarization
is, depending on the system parameters either parallel or antiparallel to the
f-magnetization. By investigating the densities of states, one observes that
the change of sign of the conduction band polarization is closely connected to
the hybridization gap, which is only apparent in the case of almost complete
polarization of the f-electrons. Finite-temperature calculations are also
performed, the Curie temperature as function of electron density and f-level
position are determined. In the intermediate-valence regime, the phase
transitions are found to be of second order.
