Abstract
Spin polarized Fe ${L}_{3}{M}_{2,3}{M}_{2,3}$ and ${L}_{3}{M}_{2,3}V$ Auger-electron spectra were measured and calculated using on-resonance excitation energies of linearly polarized photons (at the ${2p}_{3/2}$ threshold) as well as in the off-resonance region. Both the intensity distribution and the spin polarization in the experimentally obtained Auger spectra are explained by means of the theoretical model taking into account spin-orbit splitting of core levels and exchange interaction of the core states with the polarized valence band. Different contributions to the Auger spin polarization of both $\mathrm{CCC}$ (Fe ${L}_{3}{M}_{2,3}{M}_{2,3})$ and $\mathrm{CCV}$ (Fe ${L}_{3}{M}_{2,3}V)$ Auger spectra are discussed. Auger electron spin polarization is positive by transitions to the singlet final two-hole states and is increased with increasing core state-valence state exchange interaction, whereas for the triplet final states the opposite behavior is found.
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