Transport Theory for Ferromagnets

A quasiclassical transport theory for ferromagnets of large bandwidth is outlined, covering both the ordinary galvanomagnetic effects associated with the Lorentz force and the "spontaneous" effects related specifically to the magnetization. The latter effects are mediated by the spin-orbit interaction and are shown to consist of a scattering-independent Hall effect with no concurrent changes of the longitudinal resistivity, and a Hall effect accompanied by changes of this resistivity and which appears only in the presence of impurity scattering. The manner in which these various effects combine with the usual galvanomagnetic effects is also investigated.