EXAFS and cumulant expansion studies of an amorphous Se90P10 alloy produced by mechanical alloying

We investigated the local atomic order of an amorphous Se90P10 alloy produced by Mechanical Alloying through EXAFS measurements on Se K edge at five temperatures followed by a cumulant expansion analysis. We obtained a lot of structural information such as average coordination numbers and interatomic distances, structural and thermal disorder, asymmetry of the pair distribution functions gij(r)gij(r), anharmonicity of the interatomic potential, thermal expansion and Einstein and Debye temperatures for the Se–Se and Se–P pairs. We also reconstructed the gij(r)gij(r) functions for the Se–Se and Se–P pairs at the temperatures investigated.

► EXAFS was used to investigate the local atomic order of Se90P10 alloy. ► Cumulant expansion method furnished disorder, asymmetry and thermal expansion. ► Partial distribution functions gij(r)gij(r) for Se–Se and Se–P pairs were reconstructed.