Temperature Dependence of Magneto-Optical Spectra in EuO Epitaxial Films

Ferromagnetic EuO films were epitaxially grown on MgO substrate. The Curie temperature Tc of the obtained film was 69K. Spectra of magneto-optical polar Kerr rotation and Kerr ellipticity were measured from the substrate side of the MgO/EuO/Ag structure using the photoelastic modulator technique for photon energies between 1.2 and 4 eV under the magnetic field of 1T. Huge magneto-optical effect was obtained. A few spectral structures were observed for photon energies between 1.2 and 2.6eV, which undergo strong temperature dependence.