Magnetostatic modes of stripe domain structure

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Abstract
In connection with our study of ferromagnetic resonance in nonsaturated magnetic films or platelets, we have also considered the spectrum of magnetostatic modes for a stripe domain structure. For materials with large q (=HA/4πMs), the domain walls are very thin compared to the stripe width and the effective internal field, including anisotropy and demagnetizing fields, is relatively uniform within each domain. In a film of finite thickness the modes are essentially those given by Damon and van de Vaart for a disk uniformly magnetied normal to the plane. Only volume waves are permitted. If there is a nonzero component of the propagation vector in the direction of the intersection of the film plane and the domain wall, the magnetic potential must vanish at each wall. This condition requires that the propagation constant associated with the direction normal to the walls=integer×π/domain width. The domain walls are ’’transparent’’ for propagation normal to their planes and the corresponding magnetostatic modes are identical to those of a normally magnetized saturated film.

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