X -Ray Absorption Near Edge Structure (XANES) Calculations for the Amorphous $Fe_{80}B_{20}$- and $Ni_{80}B_{20}$-Alloys

摘要

anes spectra of the amorphous $Fe_{80}B_{20}$- and $Ni_{80}B_{20}$-alloys have been investigated using the electron multiple scattering theory of Durham et al. The calculations were based on several models for the structure of amorphous $Fe_{80}B_{20}$ and $Ni_{80}B_{20}$. Very good agreement between theoretical and experimental XANES curves was met. Opposite to former expectations for obtaining information on bond angles by XANES, this study shows that XANES points to more complex features of the structure than can be expressed in terms of bond angles.