Angle- and spin-resolved photoemission from ferromagnets

Equations for angle- and spin-resolved photoemission from core levels of ferromagnets are derived using the atomic model. They are applied to the np subshells and to the particular geometries of experiment with the photoemission normal to the surface, which have been used already in several experiments. It is shown that for these geometries the spin-resolved spectra obtained with linearly polarized light are especially simple and contain the contribution of only one or two magnetic sublevels of the np(3/2) state, and of only one sublevel of the np(1/2) state, which allow one to resolve the magnetic splining of core levels. The use of circularly polarized or unpolarized light gives a less transparent picture.