Figure 2 | Scientific Reports

Figure 2

From: Resonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer

Figure 2

(a,b) Dispersion relations calculated for two infinite films made of Py and FM2 separated by a non-magnetic spacer of width (a) 200 nm and (b) 10 nm. Colormaps in the background present results obtained by means of micromagnetic simulations, whereas green points correspond to the results of FD-FEM calculations. The dashed blue and the dash-dotted red lines are the analytical dispersion relations of SWs supported by isolated FM2 and Py films, respectively. The horizontal line marks the frequency \(f=11\) GHz used in further calculations. (c) Dependence of the wavenumber of the slow modes, marked with d and g in (b), located predominantly in FM2, on the separation between films at frequency 11 GHz. (d–g) Profiles of the dynamic \(m_x\) component of the magnetization (normalized to a maximum of 1) of the (d), (g) slow and (e,f) fast modes of the Py/FM2 bilayer with spacer width 10 nm at frequency 11 GHz. The positions of these modes on the dispersion diagram are marked with letters d–g in panel (b).

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