Abstract
Spin-wave propagation in submicron magnonic waveguides, with and without translational-symmetry-broken structural bending, was examined by using micromagnetic simulations. The dispersion relations and mode patterns of spin waves were derived to analyze dynamic excitation in those waveguides. Inclusion of such bending into waveguides is found to be decisive to the appearance of antisymmetric modes. If there is no bending, almost no excitation of antisymmetric modes occurs. The efficient antisymmetric-mode excitation is attributed to the scattering effect of the disordered potential, on the incident symmetric modes, due to structural distortion. Moreover, comparison with a previous study reveals that inhomogeneous static magnetization in the bent area is dispensable for antisymmetric-mode excitation.
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