Analysis of optical and magnetooptical spectra of Fe5Si3 and Fe3Si magnetic silicides using spectral magnetoellipsometry

作者：Lyashchenko S A^*; Popov Z I; Varnakov S N; Popov E A; Molokeev M S; Yakovlev I A; Kuzubov A A; Ovchinnikov S G; Shamirzaev T S; Latyshev A V; Saranin A A

来源：Journal of Experimental and Theoretical Physics, 2015, 120(5): 886-893.

DOI：10.1134/S1063776115050155

The optical, magnetooptical, and magnetic properties of polycrystalline (Fe5Si3/SiO2/Si(100)) and epitaxial Fe3Si/Si(111) films are investigated by spectral magnetoellipsometry. The dispersion of the complex refractive index of Fe5Si3 is measured using multiangle spectral ellipsometry in the range of 250-1000 nm. The dispersion of complex Voigt magnetooptical parameters Q is determined for Fe5Si3 and Fe3Si in the range of 1.6-4.9 eV. The spectral dependence of magnetic circular dichroism for both silicides has revealed a series of resonance peaks. The energies of the detected peaks correspond to interband electron transitions for spin-polarized densities of electron states (DOS) calculated from first principles for bulk Fe5Si3 and Fe3Si crystals.

• 出版日期2015-5