Magnonic band engineering by intrinsic and extrinsic mirror symmetry breaking in antidot spin-wave waveguides.

摘要: We theoretically study the spin-wave spectra in magnonic waveguides periodically patterned with nanoscale square antidots. show that structural changes breaking mirror symmetry of waveguide can close bandgap. The effect these intrinsic be compensated by adjusted asymmetric external bias magnetic field, i.e., an extrinsic factor. This allows for recovery bandgaps. described methods used developing parallel models recovering bandgaps closed due to a fabrication defect. model developed here is particular magnonics, emerging field combining spin dynamics and spintronics. However, underlying principle this development squarely based upon translational symmetries, thus, we believe idea correcting defect means, should applicable spin-waves both exchange dipolar interaction regimes, as well other waves general.