Impact of Spin Wave Dispersion on Surface Acoustic Wave Velocity

Abstract

The dependence of the velocity of surface acoustic wave (SAW) as a function of an external applied magnetic field is investigated in a Fe thin film epitaxially grown on a piezoelectric GaAs substrate. The SAW velocity is observed to strongly depend on both the amplitude and direction of the magnetic field. To interpret the experimental data a phenomenological approach to the relative change in SAW velocity is implemented. We find that the experimental velocity variation can be well reproduced provided that the spin wave dispersion is taken into account. The validity of this phenomenological model is attested by the comparison with a quasi-exact magnetoelastic one.

References in corpus (3)

• Surface acoustic wave driven ferromagnetic resonance in (Ga,Mn)(As,P) epilayers
• Symmetry of the Magnetoelastic Interaction of Rayleigh and Shear Horizontal Magnetoacoustic Waves in Nickel Thin Films on LiTaO${}_3$
• Non-symmetric spin-pumping in a multiferroic heterostructure

Cited by in corpus (4)

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• Symmetry of the coupling between surface acoustic waves and spin waves in synthetic antiferromagnets
• Magnetically Programmable Surface Acoustic Wave Filters: Device Concept and Predictive Modeling