L. Giovannini et al., Second order magneto-optic effects in Brillouin scattering from spin wavesin magnetic multilayers, J APPL PHYS, 89(11), 2001, pp. 6698-6700
The Brillouin light scattering cross section from a thick magnetic multilay
er has been calculated using a theoretical model based on a macroscopic par
tial waves approach for the calculation of the normal modes. Special attent
ion has been paid to analyzing the effect of inclusion of the second order
magneto-optic constant in addition to the first order one (corresponding to
Voigt and Faraday effects, respectively). This model has been exploited to
analyze the experimental Brillouin spectra measured from a several nm thic
k Ni/Cu bilayer. Both surface and bulk standing spin waves have been experi
mentally detected for different incident angles and applied magnetic fields
(including field reversal). The measured spectra can be satisfactorily rep
roduced by our model, allowing the determination of magnetic and magneto-op
tic parameters of the samples. (C) 2001 American Institute of Physics.