Random distribution and miscibility of Cd1−xZnxTe alloy from exafs
作者： N. Motta , A. Balzarotti , P. Letardi , A. Kisiel , M.T. Czyzyk
DOI: 10.1016/0022-0248(85)90144-7
关键词: Absorption (electromagnetic radiation) 、 Miscibility 、 Distribution (number theory) 、 Mixing (physics) 、 Extended X-ray absorption fine structure 、 Alloy 、 Condensed matter physics 、 Crystal 、 Chemistry 、 Ternary operation
摘要: We report EXAFS (extended X-ray absorption fine structure) measurements above the LIII edge of Te in Cd1−xZnxTe for five compositions x. As other II–VI zincblende ternary alloys we find that distribution near-neighbours is bimodal and closer to Pauling-Huggins limit than virtual crystal approximation limit. This behaviour predicted by a model based on random cations fcc sublattice highly distorted anions. The second nearest neighbours multimodal. Within framework this compute mixing free energy critical temperature using Bragg-Williams approximation.
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