Abstract:
The optical properties of Ni$_3$Al$_{1-x}$Mn$_x$ ($x$ = 0–1) ferromagnetic alloys have been studied in the spectral range 0.22–15 $\mu$m by the ellipsometry method. The substitution of manganese for aluminum is shown to substantially change the optical conductivity spectra. The concentration dependences of the plasma and relaxation frequencies of electrons have been found. The behavior of the optical characteristics of the alloys under study with varying $x$ has been analyzed with allowance for the structure of the energy spectrum of electrons and the influence of a transition from the band magnetism to the spin-localized magnetism.
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