Contribution à l'étude des propriétés optiques des matériaux liquides par ellipsométrie spectroscopique

Abstract : The instrument used to determine the opticals constants of liquid metals was ellipsometer spectroscopic. The metals were melted in crucible enclosed in a cell filled with argon-hydrogen. The temperature was measured with a chromel-alumel thermocouple. The opticals properties of the liquid metals in the visible, it usually assumed obey mearly-free-electron-libre, and it has been conventional, in analysis of experimental data, to find values of the Drude parameters, the effective electron number par atom and the relaxation time, by fitting the Drude expressions for the optical constants to the experimental data. The results of tin andtin-lead binary alloy, to differ from the Drude theory, this departure is due to with the oxyde film formed on the surface
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Abdelmjid El Ghemmaz. Contribution à l'étude des propriétés optiques des matériaux liquides par ellipsométrie spectroscopique. Autre [cond-mat.other]. Université Paul Verlaine - Metz, 1996. Français. ⟨NNT : 1996METZ043S⟩. ⟨tel-01777156⟩

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