Unidirectional edge spin waves induced by spin-momentum locking of elastic waves in magnetic waveguides

Abstract

We study the control of edge magnons in magnetic waveguides by chiral elastic waves. Micromagnetic simulations show that chiral elastic waves can drive edge magnons to propagate unidirectionally. This effect depends on the spin-momentum locking of the elastic waves, enabling edge magnons to be precisely driven to propagate unidirectionally through selective excitation of elastic waves with specific spin angular momentum. This approach enables unidirectional propagation of edge magnons in magnetic waveguides and has potential applications in the spin-wave device design.