T he optical second-harmonic intensity generated by magnetic multilayers of cobalt and gold strongly depends on the m agnetization. At norm al incidence the results are independent of the am ount of bulk cobalt and gold, b u t are accurately described by pure m agnetic interface contri butions. This represents a way to probe buried interface m agnetism using magnetization-induced second-harmonic generation.
Optical second harmonic generation studies of Co/Au interfaces show a clear magnetic field induced effect at these interfaces, leading the way to a nonlinear optical probe that is uniquely sensitive to surface and interface magnetism.
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