We investigated the influence of electron correlations on the temperat
ure dependence of the electronic structure of the prototypical ferroma
gnets Ni, Fe(bcc), and Gd using a many-body evaluation of a generalize
d model. of magnetism. The single-particle energies are taken from an
LSDA band structure calculation. The many-particle interactions are de
scribed by just two parameters, an intraband Coulomb interaction U and
an interband exchange J. The self-consistent model solution yields ve
ry realistic values for the T = 0 moments and the Curie temperatures.
Typical differences as well as common features of the magnetism in Ni,
Fe and Gd are worked out.