Temperature Dependence of Faraday Effect for Cd1-xMnxTe Films

The Faraday effect in Cd
1-xMn_xTe films prepared by ionized-cluster beams has been analyzed theoretically. Faraday rotation spectra are calculated taking account of a broadening parameter Γ of exciton absorption in a nondegenerate second-order perturbation theory. The calculated spectra are compared with the experimental data of Cd_1-xMn_xTe films. The results reveal that the thermal broadening of exciton absorption is due to the scattering of an exciton by longitudinal optical (LO) phonons.