Schematic of the magnonic crystal waveguide comprising of alternating nanostripes of two ferromagnetic materials. The lattice constant a = M + N, where M and N are the respective widths of the stripes of the two materials. A magnetic field H is applied (a) transversely and (b) longitudinally to the waveguide, and q is the wave vector of the SWs.
Ma et al. Nanoscale Research Letters 2012 7:498 doi:10.1186/1556-276X-7-498