Tailoring the interaction between spin waves and domain walls in nanostripes with perpendicular magnetic anisotropy

We study the interaction between spin waves and domain walls in perpendicularly magnetized nanostripes in the presence of a uniform in-plane field, and also how such a field can be used to modulate the domain wall velocity and the spin wave phase that result from this interaction. On one hand, the external field is found to enhance the excitation of an internal non-uniform flexural mode at specific frequencies, which can lead to an increase by a factor of six in the domain wall velocity. On the other hand, in a lower frequency regime, the field orientation modulates the domain wall reflectivity yielding higher velocities when the field is applied along the nanostripe width. Finally, a linear relation of slope two is found between the in-plane field angle and the phase shift induced by the domain wall on the spin wave passing through. (paper)