Abstract
The magnetism and the electronic structure of epitaxial fcc Co/Cu(001) films were investigated by spin-polarized electron-energy-loss spectroscopy (SPEELS). Strong spin-flip scattering reveals an exchange splitting of 0.8 eV and a Stoner gap of 300 meV, independent of thickness. Films above 2 monolayers (ML) thickness show ferromagnetic order at room temperature, while the monolayer Co/Cu(001) cannot be remanently magnetized above 80 k. SPEELS spectra from monolayer films are very similar to spectra from bulklike films (20 ML) and display no evidence for enhanced magnetic moments
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