Figure 3: (a), (c) Three lowest magnonic gaps (shaded) versus rod ellipticity for 2D Co/Fe MCs with lattice constant 300 nm, filling fraction 0.3, and two angles of in-plane rotation of the rods: (a) and (c) . (b), (d) The width of the lowest gaps and bands versus in (a) and (c), respectively. The width of the second (2g) and third (3g) gaps is plotted with dashed line. Solid line represents the width of the lowest bands: the first (1b), the second (2b), and, in the range of values in which the gap between them does not occur, the band resulting from their merging .