NUMERICAL-SIMULATION OF QUASISURFACE MAGNETOSTATIC WAVES IN A FERRITEFILM WITH 2 MAGNETIC CHANNELS

Quasisurface magnetostatic waves propagating in a ferrite film along t wo magnetized channels are simulated numerically. It is shown that the interaction between the channels is manifested differently, depending on the wavelength. In the long-wavelength region the interaction betw een the channels has a distributed character; in the short-wavelength region the interaction between the channels appears as if it takes pla ce at their boundary. The magnetized region of the ferrite film betwee n the channels behaves both as a conductor of the alternating field an d as a medium with eigenmodes, so that under certain conditions the wa veguide can be transformed into a three-channel structure. The dispers ion curves of the magnetostatic wave modes of a two-channel waveguide lie in zones bounded by the dispersion curves of the corresponding mod es of a one-channel waveguide of double width. As the gap between the channels increases, the dispersion curves of the odd modes shift towar d shorter wavelengths, and those of the even modes shift toward longer wavelengths. (C) 1998 American Institute of Physics. [S1063-7842(98)0 1602-X].