Abstract
The dispersional properties of a surface magnetostatic wave (MSW) in a laminar structure consisting of ferrite film and a high-temperature superconducting (HTSC) layer are studied in detail. The propagation of surface MSW in this structure is investigated, and the dispersional equation is obtained; the granular character of the HTSC films and the influence of constant magnetic field are taken into account here. The magnetic field is responsible for breakdown of the Josephson layer of granular HTSC films and the appearance of nonsuperconducting layers close to the film surface. It follows from the calculation results that, when the HTSC film passes to the superconducting state, the dispersional characteristics of the MSW undergo a discontinuity. The magnitude of the discontinuity depends on the film thickness, the critical current, and the granule size. The results obtained may be used in designing various microelectronic devices based on granular HTSC films.
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