Standing spin wave resonant properties of spin-twist structure in exchange coupled composite films

In the present study, a spin-twist structure embedded in an exchange coupled hard/soft/hard tri-layer system was proposed as a novel spin wave (SW) guide. Details of spin wave dynamics was comparatively analyzed for tri-layers with various layer thicknesses and the inter-layer exchange coupling. The practical performance as a wave guide was optimized in terms of SW resonance frequency and the expected inductive output, both of them were successfully improved by integrating the merit of individual layers through dual exchange bias effects.