A magnetic dichroism in photoemission from ferromagnets induced by unp
olarized light is observed for the first time in the valence band regi
on as well as for surface states. The study was carried out with magne
tized Fe(110), Co(0001), and Gd(0001) films grown epitaxially on W(110
). This phenomenon leads to an intensity asymmetry for opposite direct
ions of the sample magnetization. It can be easily used for a routine
laboratory diagnostic of magnetic behavior. A simple theoretical inter
pretation of the phenomenon based on the atomic model is given.