Numerical solution of the integral equations for MSSW

Magnetostatic surface wave (MSSW) propagation on one or more co-planar rectangular films of finite width is solved numerically using an integral equation formulation. In the case of uniform in-plane bias, the eigenfrequencies and the associated eigenvectors are obtained by solving the coupled equations which determines the frequency dispersion and the spatial form of MSSW potentials, in addition to modes having the expected localization of energy on the film surfaces, the results confirm the existence of certain modes having primary energy concentration at the film edges. The formulation is also specialized to the case of two uniformly magnetized rectangular parallel strips separated by an air gap and coupled via the fringing fields of magnetostatic Waves. The results should prove useful in modelling directional couplers for MSSW.