We report EXAFS (extended X-ray absorption fine structure) measurements above the LIII edge of Te in Cd1−xZnxTe for five compositions x. As in other II–VI zincblende ternary alloys we find that the distribution of near-neighbours is bimodal and closer to the Pauling-Huggins limit than to the virtual crystal approximation limit. This behaviour is predicted by a model based on a random distribution of cations on a fcc sublattice and a highly distorted fcc sublattice for anions. The distribution of second nearest neighbours is multimodal. Within the framework of this model we compute the mixing free energy and the critical temperature using the Bragg-Williams approximation.
Motta, N., Balzarotti, A., Letardi, P., Kisiel, A., Czyzyk, M., Zimnal Starnawska, M., et al. (1985). Random distribution and miscibility of Cd1-xZnxTe alloy from EXAFS, 72(1-2), 205-209 [10.1016/0022-0248(85)90144-7].
Random distribution and miscibility of Cd1-xZnxTe alloy from EXAFS
BALZAROTTI, ADALBERTO;
1985-01-01
Abstract
We report EXAFS (extended X-ray absorption fine structure) measurements above the LIII edge of Te in Cd1−xZnxTe for five compositions x. As in other II–VI zincblende ternary alloys we find that the distribution of near-neighbours is bimodal and closer to the Pauling-Huggins limit than to the virtual crystal approximation limit. This behaviour is predicted by a model based on a random distribution of cations on a fcc sublattice and a highly distorted fcc sublattice for anions. The distribution of second nearest neighbours is multimodal. Within the framework of this model we compute the mixing free energy and the critical temperature using the Bragg-Williams approximation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
