The FMR of a close-packed bubble lattice

A theory is given of FMR of a close packed hexagonal lattice of magnetic bubbles in a thin uniaxial ferromagnetic layer as a function of the intensity of an external magnetic field applied normal to the easy axis i.e. in the plane of the layer. The solution is based on a model which permits the inclusion of the effect of inhomogeneities of the hf demagnetizing field inside the specimen. The theory yields three magnetic modes which are in very good agreement with a number of experiments carried out on magnetoplumbite platelets. The physical interpretation of the results is discussed.