Magnetization-induced optical second harmonic generation (MSHG) from exchange-biased Mn/Co thin films shows monolayer period oscillations at the Mn/Co interface as a function of Co thickness. Similar oscillations are found in the exchange bias (HE) and the coercivity (HC) in both the interface sensitive MSHG and the bulk sensitive magneto-optical Kerr effect, indicating that magnetic reversal in the Co bulk and at the Mn/Co interface is collinear. Assuming a linear relationship between the MSHG asymmetry and the magnetic moment, our results suggest that there is an enhancement of the interface net magnetic moment at the full monolayer regions.
Valev, V. K., Kirilyuk, A., Dalla Longa, F., Kohlhepp, J. T., Koopmans, B., & Rasing, T. H. M. (2007). Observation of periodic oscillations in magnetization-induced second harmonic generation at the Mn/Co interface. Physical Review B, 75(1), 012401-1/4. . https://doi.org/10.1103/PhysRevB.75.012401