Abstract
We develop a model for magnetization-induced second-harmonic-generation (MSHG) experiments on Co/Cu(001) and Cu/Co(001) overlayers by expanding the nonlinear optical susceptibility to lowest order in the magnetization, and taking the latter to be given by the interfacial moments from ab initio electronic-structure calculations. The model accounts well for the relative MSHG signal from Co/Cu(001), but contrary to experiment predicts a nearly constant signal for Cu/Co(001). We discuss the possibility of quantum-well states accounting for the failure in the latter case.
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