TEMPERATURE-DEPENDENT ELECTRONIC-STRUCTURE OF NI, FE AND GD

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.