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(a) Sketch of the samples used in the experiments. (b) and (c) Calculated distributions of the internal static magnetic field and the lower cutoff frequency of spin waves across the width of the stripe waveguide illustrating the effect of localization of spin waves in the field-induced waveguiding channels.
Maps of the intensity of propagating spin waves recorded for different excitation frequencies , as indicated. The maps were obtained by scanning the area of with spatial step sizes of 100 and in the directions perpendicular and parallel to the axis of the stripe waveguide, respectively. The spatial decay of spin waves is numerically compensated.
Characteristics of the spin-wave beams as a function of the excitation frequency. (a) Distance between the centers of the spin-wave beams localized in the field-induced waveguiding channels and the width of the beams measured at one half of their maximum intensity. The point at corresponds to the width of the single beam. (b) Propagation length of spin waves corresponding to the decrease of their amplitude by a factor of .
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