SHORT RANGE ORDER DETERMINATION IN AMORPHOUS FeGe2 WITH ANOMALOUS X-RAY SCATTERING

The Differential Anomalous X-Ray Scattering technique has been applied to an amorphous FeGe2 metallic thin film in order to study its local atomic structure. A radial distribution function, as well as both Ge and Fe differential distribution functions, have been determined for this alloy. Ge is coordinated, primarily, by Fe with the bulk of the Ge-Ge distances being too long for covalent or metallic bonding. The structure of this amorphous alloy has also been compared to that of the crystalline phase with the same composition. Striking differences in the environments about Ge atoms in the alloys demonstrate that the amorphous phase is not a broadened form of the crystal.