Abstract
Using an electronic theory we calculate the frequency-dependent nonlinear magneto-optical Kerr rotation and show that the second harmonic polarization ellipsis is more strongly influenced by magnetism than in the linear case. We find for the magnetization dependence of the nonlinear and linear magneto-optical susceptibility tensor elements a linear dependence on magnetization. The influence of the symmetry of matrix elements for s or d transitions on the second harmonic intensity is discussed. Furthermore, the ab initio nonlinear Kerr spectra of Fe layers of different thicknesses are presented.
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