Magnetic dichroism in x-ray photoemission

Abstract

Magnetic dichroism in spin resolved photoemission gives information about the correlation between the valence spin, the core hole orbital moment and the core hole spin. For photoemission from an open shell the sum rules give the expectation value of the orbital magnetic moment and quadrupole moment. Analysis of the angular distribution gives the higher magnetic moments. Therefore, polarized photoemission measurements are important for the understanding of the magnetic properties of transition metal and rare earth materials, such as for ferromagnetic nickel where measurements indicate an enhanced orbital magnetic moment at the surface.