In:
EPJ Web of Conferences, EDP Sciences, Vol. 185 ( 2018), p. 03014-
Abstract:
Optical characteristics (electron energy loss function, optical conductivity σ, permittivity ε, refractive index n, extinction coefficient k, and absorption coefficient α) of a 30 nm thick epitaxial Fe 3 Si iron silicide films grown at different silicon substrate temperature (26, 100, 200, 300 ˚C) were determined within E = 0.74–6.46 eV photon energy range using spectroscopic ellipsometry technique. The experimental data are compared to the optical characteristics calculated in the framework of the density functional theory using the GGA–PBE approximation. Variations of the optical characteristics spectra are discussed from the point of view of chemical ordering of DO3 type crystal structure. It is asserted that the electron energy-loss function, optical conductivity and extinction coefficient of the Fe 3 Si iron silicide films undergo noticeable changes in different spectral ranges over the whole spectrum between 0.74 and 6.46 eV due to variation in the chemical order. Information on the effect of chemical ordering on the optical properties obtained here allows one to carry out quick qualitative analysis of Fe3Si film crystal quality during the synthesis procedures by ellipsometry method in situ.
Type of Medium:
Online Resource
ISSN:
2100-014X
DOI:
10.1051/epjconf/201818503014
Language:
English
Publisher:
EDP Sciences
Publication Date:
2018
detail.hit.zdb_id:
2595425-8
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