ENHANCED MULTIPLE PATH LINES IN MAGNETIC EXAFS

In systematic magnetic EXAFS studies it is observed that in the Fourie r transform (FT) of the dichroic signal multiple path peaks are strong ly enhanced, while the corresponding maxima at higher r-values in the spin-averaged EXAFS FT are much smaller or invisible. This behavior is reflected by the occurrence of additional harmonic frequencies in the magnetic raw spectra and explains their sharper structure. These obse rvations can be interpreted by the different strengths of the elastic scattering cross sections for parallel and anti-parallel orientation o f the outgoing photo-electron wave and the spins of the magnetic elect rons. This phenomenon might also play an important role in the near ed ge dichroism of oxides, which show characteristic oscillations superim posed on the dichroic effect.