Abstract
In order to test the presence of interatomic multi-atom resonant photoemission (MARPE) in 3 d magnetic ultrathin films, 2 p photoelectron emission of various ferromagnetic 3 d metals was studied while the excitation energy was tuned around the L 2,3 core level absorption edge of a different 3 d metal. Both elements were in direct contact either as bilayer or as alloys to maximize this possible effect. Systems under study were Fe/Co, Fe/Ni, Fe 30Ni 70, Co, Co 90Mn 10, and Ni 90Mn 10, all grown as epitaxial films on Cu(001). No measurable change in intensity of the 2 p photoemission intensities in normal emission for 45° incidence of more than 2.5–5% was found as a result of resonant excitation of neighboring atoms in any of these systems. We can thus exclude the presence of significant MARPE in these metallic systems in the present experimental geometry. This is further confirmed by the photon energy dependence of the linear magnetic dichroism in the Fe 2 p photoemission of a Fe/Co film, which is not influenced by Co L 2,3 edge resonant absorption.
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