Microwave permeability of ferromagnetic thin films with stripe domain structure

We report the observation of multiple permeability peaks for thin ferromagnetic films, in the 10 MHz to 6 GHz range. This behavior is correlated with the presence of perpendicular anisotropy and stripe domains. Because the perpendicular anisotropy is much smaller than the saturation magnetization of the layer, we propose an adaptation of the classical domain mode resonance model to the configuration with oblique magnetization in the stripes. (C) 1997 American Institute of Physics.