Optical Spectroscopy and Electronic Structure of Compounds HoNi_(5-x)Al_x (x = 0, 1, 2)

摘要

The optical properties of the compounds HoNi_(5-x)Al_x (x = 0, 1, 2) have been investigated using the ellipsometric method in the wavelength range from 0.22 to 16 μm. The electronic structure of these intermetallic compounds has been calculated in the local electron-spin density approximation with the correction for strong electronic interactions in the 4f shell of the holmium ions. The experimental dispersion dependences of optical conductivity in the region of interband light absorption have been interpreted based on the results of the calculation of the electron density of states. The plasma and relaxation frequencies of electrons have been determined.