Magnetization Dynamics and Spin Wave Excitation in Strain-Mediated Multiferroic Heterostructures With the Interfacial Dzyaloshinskii-Moriya Interaction

Abstract

The effect of the interfacial Dzyaloshinskii-Moriya interaction (i-DMI) on the magnetization dynamics induced by strain is described within the framework of micromagnetic simulations taking into the magnetoelastic coupling between the spin and strain in multiferroic heterostructures. In this magnetized system, biaxial in-plane strain act on the perpendicular magnetization without bias magnetic field is introduced. As the micromagnetic simulation results have shown, the lateral magnetization dynamics and spin wave were excited with the i-DMI induced intrinsic magnetization tilting along the nanostrip width direction. It is found that the excitation strain field could generate a quantized width mode with odd mode numbers. In addition, our simulation reveals that the excitation field with higher frequency generates two spin wave modes with a different mean free path. Our works, therefore, show the potential of using a strain with the presence of i-DMI as the perspective for integrating spin wave emitters into future logic or computing devices and hinting at possible technological applications in strain-controlled spintronic systems.