title: Magnetic field dependence of the circular dichroism in EuTe.
abstract: The absorption magnetic circular dichroism in EuTe was investigated as a function of the magnetic field at T = 2 K. In order to describe the optical spectra theoretically, we developed a model that takes into account the magnetic order of the lattice as a function of the magnetic field. The model allows us to calculate the absorption spectrum as a continuous function of the magnetic field intensity. The theory accounts for the strongly dichroic absorption seen at high fields, and for its continuous evolution towards the B = 0  spectrum, which is described by a much weaker and much broader absorption line. The drastic changes observed in the experimental spectra as a function of magnetic field are fully explained by the dependence of the Eu(2+)  spin arrangement on the external magnetic field.
authors: Instituto de Física, Universidade de São Paulo, Caixa Postal 66318, 05315-970 São Paulo, Brazil.
authors: A B
authors: AB
authors: Henriques
authors: G D
authors: GD
authors: Galgano
authors: B L
authors: BL
authors: Díaz
authors: P H O
authors: PH
authors: Rappl
authors: E
authors: E
authors: Abramof