Micromagnetic simulations of magnetoelastic spin wave excitation in scaled magnetic waveguides

Abstract

We study the excitation of spin waves in scaled magnetic waveguides using the magnetoelastic effect. In uniformly magnetized systems, normal strains parallel or perpendicular to the magnetization direction do not lead to spin wave excitation since the magnetoelastic torque is zero. Using micromagnetic simulations, we show that the nonuniformity of the magnetization in submicron waveguides due to the effect of the demagnetizing field leads to the excitation of spin waves for oscillating normal strains both parallel and perpendicular to the magnetization. The excitation by biaxial normal in-plane strain was found to be much more efficient than by uniaxial normal out-of-plane strain. For narrow waveguides with widths of 200\,nm, the excitation efficiency of biaxial normal in-plane strain was comparable to that of shear strain.

11 pages, 3 figures

References in corpus (1)

• Electric-field control of spin waves at room temperature in multiferroic BiFeO3

Cited by in corpus (6)

• An Introduction to Spin Wave Computing
• Fan-out enabled spin wave majority gate
• Confined magnetoelastic waves in thin waveguides
• Fully Resonant Magneto-elastic Spin-wave Excitation by Surface Acoustic Waves under Conservation of Energy and Linear Momentum
• Voltage-Controlled Reconfigurable Magnonic Crystal at the Submicron Scale
• Unidirectional propagation of spin waves excited by femtosecond laser pulses in a planar waveguide