EXAFS and cumulant expansion studies of an amorphous Se90P10 alloy produced by mechanical alloying |
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Authors: | K.D. Machado E.C. Oliveira S.F. Stolf |
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Affiliation: | a Departamento de Física, Centro Politécnico, Universidade Federal do Paraná, 81531-990, Curitiba, Paraná, Brazilb Centro de Engenharia e Ciências Exatas, UNIOESTE, 85903-000, Toledo, PR, Brazil |
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Abstract: | 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), 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) functions for the Se-Se and Se-P pairs at the temperatures investigated. |
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Keywords: | A. Amorphous alloys A. Semiconductors C. EXAFS D. Anharmonicity |
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