Abstract
The nonlinear second harmonic reflectivity of magnetic surfaces is found to display longitudinal nonlinear Kerr rotations that are three orders of magnitude larger than their linear equivalent. In the transversal geometry, similar enhancements are observed for the intensity changes. The results are in good agreement with recent theoretical predictions. For ultra-thin Au overlayers on Fe, the nonlinear Kerr effect is extremely sensitive to the interface roughness.
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