MAGNETIC DICHROISM IN OFF-NORMAL VALENCE-BAND PHOTOEMISSION

Magnetic dichroism in off-normal photoemission from valence bands of f erromagnets is studied by both symmetry considerations and numerical r elativistic calculations. In general set-ups (light polarization, inci dence and emission directions, magnetization direction), dichroism is either due to change of the light polarization or due to magnetization reversal, or due to both. Relations between photoemission intensities for different set-ups lead to the definition of asymmetries in order to probe the origin of the dichroism. Numerical relativistic photoemis sion calculations provide quantitative results for prototypical system s: Ni/Cu(001) with perpendicular magnetization, Co/Cu(001) with in-pla ne magnetization, and non-magnetic Cu(001). (C) 1998 Elsevier Science B.V. All rights reserved.