  Within the linear response of polycrystalline magnetic films to electric
currents, a general analysis predicts three new galvanomagnetic effects
originated from the two-dimensional nature of the films. These new
galvanomagnetic effects, which differ from the conventional extraordinary Hall
effect and anisotropic magnetoresistance, are follows. 1) The longitudinal
resistivity depends linearly on the magnetization component perpendicular to a
film. 2) A current parallel to the magnetization can generate an electric field
in the vertical direction of a film. 3) A current perpendicular to a film can
generate an electric field along the magnetization direction.
