Recent studies have revealed that domain walls in magnetic nanostructures canserve as compact, energy-efficient spin-wave waveguides for building magnonicdevices that are considered promising candidates for overcoming the challengesand bottlenecks of today's CMOS technologies. However, imprinting longstrip-domain walls into magnetic nanowires remains a challenge, especially incurved geometries. Here, through micromagnetic simulations, we present a methodfor writing strip-domain walls into curved magnetic nanowires using spin-orbittorque. We employ Y-shaped magnetic nanostructures as well as an S-shapedmagnetic nanowire to demonstrate the injection process. In addition, we verifythat the Y-shaped nanostructures that incorporate strip-domain walls canfunction as superior spin-wave multiplexers, and that spin-wave propagationalong each conduit can be controllably manipulated. This spin-wave multiplexerbased on strip-domain walls is expected to become a key signal-processingcomponent in magnon spintronics.
展开▼
