Ordering potential in liquid Al-Ge alloys structure and thermodynamics

摘要

In this paper we use the concept of ordering potential to calculate the atomic structure and the thermodynamic asymptotic limit of the liquid Al-Ge alloy, for which we previously measured the atomic structure and the electrical resistivity. The sign of the ordering potential in the region of the first nearest neighbours indicates whether the alloy is homo or hetero-coordinated. The aim of this work is to reproduce quantitatively the atomic structure by using the simple phenomenological Silbert-Young effective potential. This model can explain both the shape of the structure factor measured by neutron diffraction and the low-angle limit of the Bhatia-Thornton partial structure S_(CC)(q) given by thermodynamic measurements.