Dynamics of current-driven spin waves in a confined track

This study investigates the generation, propagation, and decay of current-induced spin waves in a confined magnetic track through both theoretical analysis and numerical simulations. We derive an analytical expression for the spin wave dispersion and amplitude, establishing a linear relationship between the applied current density and the emitted wave frequency. The results reveal a deviation between the spin wave propagation direction and the current direction. As the spin waves decay, domain walls are generated in the system, with the number of domain walls being controlled by the current density and pulse duration. This research has promising applications in the field of spintronic devices, where controlled spin wave dynamics and domain wall creation could improve information processing and data storage. By tuning current-induced spin waves, these findings may support the development of magnetic memory elements, logic devices, and neuromorphic computing architectures that use domain walls for non-volatile memory and reconfigurable processing capabilities.