Structural Study of Amorphous Mg50Ni30La20 Alloy by the Anomalous X-ray Scattering (AXS) Method

Abstract

The structure of a new amorphous Mg50Ni30La20 alloy, indicating an extremely wide supercooled liquid region, has been investigated by the anomalous X-ray scattering (AXS) method. A characteristic pronounced prepeak was observed at Q=14 nm−1 in the intensity profile. The environmental radial distribution function (RDF) for Ni was determined and the ordinary RDF was also obtained using the Mo Kα-radiation for comparison. The intensity profiles and RDFs suggest that Mg atoms form strong local ordering clusters with the other constituent elements Ni and La in this particular amorphous alloy.

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