  Rapid developments in material research of metallic ferromagnetic (III,Mn)V
semiconductors over the past few years have brought a much better understanding
of these complex materials. We review here some of the main developments and
current understanding of the bulk properties of these systems within the
metallic regime, focusing principally on the magneto-transport and
magneto-optical properties. Although several theoretical approaches are
reviewed, the bulk of the review uses the effective Hamiltonian approach, which
has proven useful in describing many of these properties namely in (Ga,Mn)As
and (In,Mn)As. The model assumes a ferromagnetic coupling between Mn d-shell
local moments mediated by holes in the semiconductor valence band.
