Abstract:
Ferromagnetic single-crystal epitaxial Fe$_3$Si films and polycrystalline Fe$_{5}$Si$_{3}$ films are obtained on Si substrates by molecular-beam epitaxy with in situ control of the structure, optical, and magnetic properties. The results of the structural, magnetic, and optical measurements are discussed. The experimental data are compared to the results of the microscopic calculation of the spin-polarized structure, the permittivity, and the optical conductivity spectra.