ABSTRACT
Magnetostatic waves in single-crystal ferrite films can be used in microwave engineering to design miniature devices such as filters, resonators, and delay lines. To excite magnetostatic waves in ferrite films (usually, YIG epitaxial films on GGG substrates) thin metal conductors, placed at or near the film surface, are used. If the field structure of the wave is reciprocal, waves propagating in both directions have equal amplitudes. But if the field structure is nonreciprocal, the amplitude is larger in the direction for which the fields have greater values at the surface where the transducer is placed. Any disturbances of cylindrical symmetry, including macroscopic defects, as pores, clifts, and so on, can be treated (in terms of coupled oscillations) as factors leading to the coupling of the Walker’s modes.
