Dispersion relations for longitudinally magnetized MCWs. (a) 16Fe/4Ni, (b) 16Fe/4Py, (c) 16Py/4Ni, (d) 16Co/4Ni, (e) 16Co/4Py, and (f) 16Co/4Fe MCWs under a H = 600 mT field. The dotted lines indicate the Brillouin zone boundaries q = nπ/a, and the first, second, and third bandgaps are denoted by the red-, green-, and blue-shaded regions, respectively. The intensities of the SWs are represented by color scale.
Ma et al. Nanoscale Research Letters 2012 7:498 doi:10.1186/1556-276X-7-498