EXAFS and cumulant expansion studies of an amorphous Se 90P 10 alloy produced by mechanical alloying

Abstract

We investigated the local atomic order of an amorphous Se 90P 10 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 g i j ( 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 g i j ( r ) functions for the Se–Se and Se–P pairs at the temperatures investigated.