Magnetic excitations in a weak-stripe-domain structure: A 2D dynamic micromagnetic approach

The high-frequency susceptibility spectra of ferromagnetic films supporting a weak-stripe-domain structure are computed using a 2D dynamic micromagnet ic model that we have developed. The existence of multiple resonances resul ting from the excitation of surface and volume modes is predicted. The main features of spectra (number of resonances, resonance frequencies, intensit ies, and linewidths) strongly depend on the equilibrium spin configuration and on the rf exciting field orientation. These theoretical results are suc cessfully compared with zero-field microwave permeability measurements.