EXAFS measurements on FeB metallic glasses: Asymmetry of the radial distribution function

The EXAFS structure measured above the K-edge of Fe in the disordered Fe₈₀B₂₀ alloy is reported. Complete agreement is obtained with X-ray diffraction results in the position of the first neighbours coordination shell when the asymmetry of the Radial Distribution Function (R.D.F.) into the EXAFS formula is included. A Finney-like R.D.F. is used to describe the pair distribution of these metallic glasses. The weak temperature dependence of the spectra is discussed in terms of the structural properties of these amorphous alloys.