Spin-dependent electron attenuation lengths and influence on spectroscopic data
Inverse photoemission from W(110) becomes spin dependent when the surface is covered with ultrathin ferromagnetic iron films. The spin asymmetry is not intrinsic to the tungsten electronic structure but is caused by spin-dependent electron attenuation within the ferromagnetic overlayer. The ratio of 1.7 +/- 0.3 between the spin-down and spin-up attenuation lengths for an electron energy of 12.6 eV above the Fermi level can be explained within a simple model by inelastic scattering. The influence of spin-dependent attenuation lengths on experimental data from electron spectroscopy is discussed and demonstrated by simulations. The observed electron spin polarization or spin asymmetry is strongly affected, while the energetic positions of features in spin-up and spin-down spectra are not.
Bibliographic Reference: Article: Journal of Magnetism and Magnetic Materials, Vol. 159 (1996) pp. 103-108
Record Number: 199611351 / Last updated on: 1996-11-21
Original language: en
Available languages: en