Journal
PHYSICS OF METALS AND METALLOGRAPHY
Volume 107, Issue 2, Pages 173-178Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0031918X09020094
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- Russian Foundation for Basic Research [08-02-00712]
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Optical properties of intermetallic compounds GdNi5 - x Cu (x) (x = 0, 0.5, 1, 1.5, and 2) have been studied in a spectral range from 0.22 to 15 mu m using the ellipsometry method. The substitution of copper for nickel has been found to lead to local changes in the interband optical conductivity spectra. A new quantum-absorption band, whose intensity increases substantially with increasing copper content, has been found at 3-4 eV. The relaxation and plasma frequencies of conduction electrons, which were calculated using data on the optical parameters, also depend on the concentration. Self-consistent calculations of the electronic structure of the intermetallic binary GdNi5 compound have been performed using the LSDA + U method. The density of electronic states for two spin projections and the frequency dependence of the interband optical conductivity of the compound have been calculated.
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