Dynamic susceptibility computations for thin magnetic films

This paper deals with the dynamic modelling of thin ferromagnetic layers, based on the coupling of Maxwellʹs equations with the nonlinear Landau–Lifschitz–Gilbert law. A 2-D micromagnetic model is described which involves a FDTD code to determine equilibrium configurations and a finite element method to compute magnetostatic fields. Finally, after linearization, the susceptibility spectra of films supporting a weak-stripe-domain structure are computed and successfully compared to existing measurements without introducing any fitting parameter.