Electronic structure studies of the buried Ni layer in a Cu/Ni/Cu multilayer by resonant photoemission at the Ni L3 edge

The electronic structure of the buried layer in a Cu/Ni/Cu multilayer was studied using resonant photoemission spectroscopy. Information on the electronic structure was extracted by utilizing the difference spectrum between the on- and off-resonance spectras. The results show that the extracted 3d band of the intervening Ni layer reveal an enhanced structure around 2-4 eV compared to that of pure Ni metal.