Topmost layer magnetization of ultrathin Cr films on Fe(100) from proton-induced spin-polarized electron emission - art. no. 140406

The magnetic ordering of the topmost surface layer of ultrathin Cr films gr own on Fe(100) is studied via spin-polarized electron emission, excited by fast protons grazingly scattered from the him surface. We find that most el ectrons originate from the topmost layer. Based on simple assumptions we ar e able to deduce the layer-dependent magnetic moments from the observed spi n polarization of electrons. We demonstrate that our method has a clearly s maller probing depth than conventional spin-polarized electron spectroscopi es.