Physical Review Letters

Spin-dependent electron attenuation by transmission through thin ferromagnetic films

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Spin-polarized photoemission spectra at low photon energies from ferromagnetic ultrathin Fe layers on Cu(100) show a substantial polarization of the Cu 3d peaks. This is attributed to spin-dependent attenuation in the Fe overlayer. Values of the spin-dependent mean free path at low electron energies are obtained. © 1991 The American Physical Society.