D. Spenato et al., MAGNETIC-ANISOTROPY AND SPIN DYNAMICS IN AMORPHOUS THIN FERROMAGNETIC-FILMS, IEEE transactions on magnetics, 31(6), 1995, pp. 4035-4037
An analytic calculation of the initial permeability frequency spectra
using the LANDAU-LIFSHITZ theory is compared with experimental results
obtained on ferromagnetic thin films with an in-plane uniaxial magnet
ic anisotropy. Agreement between the theoretical and the experimental
results may not be very good. This may be due to magnetic anisotropy d
ispersion in the film. This dispersion is studied and seems to be due
to magnetic ripples. Measurement of the ripple effect is done through
the measurement of the transverse biased susceptibility and compared w
ith theoretical results obtained with the HOFFMANN theory of ripples.