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Scanning electron microscopy and optical images of the structure under study. The uniform reference waveguide is shown on the left and the MC on the right.
(a) Calculated SW dispersion curves for uniform waveguides with (solid line) and (dashed-dotted line). The inset shows the amplitude of the fundamental width modes in uniform waveguides of different widths. (b) Normalized SW intensity measured at the distance from the antenna vs the applied frequency. Solid line—the MC; dotted line—the reference waveguide. Dashed line represents the calculation for the MC. For both panels the bias magnetic field and the saturation magnetization are 500 Oe and .
(a) Measured spin-wave intensity as a function of frequency and bias magnetic field. Logarithmic scale is used. Red (dark) corresponds to the maximum and blue (light) to the minimum SW intensity. The dotted line shows the calculated frequency for the zero SW wavenumber; solid and dashed lines mark the frequencies for the first rejection band and for the limit of antenna excitation , respectively. Distance from the antenna edge . (b) Measured spin-wave intensity as a function of propagation distance . Filled triangles—MC rejection band (the applied frequency is 8.1 GHz); filled circles—MC transmission band (8.9 GHz); opened squares—reference waveguide (8.1 GHz). Solid and dashed-dotted lines show the calculation for the MC and the reference waveguide (8.1 GHz). Bias magnetic field is 500 Oe.
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