Article Dans Une Revue Physical Review Applied Année : 2019

Surface-Acoustic-Wave Induced Ferromagnetic Resonance in Fe Thin Films and Magnetic Field Sensing

Résumé

Resonant magnetoelastic coupling (MEC) is demonstrated in an Fe thin film epitaxially grown on a piezoelectric Ga⁢As substrate with application of subgigahertz surface acoustic waves (SAWs). The frequency at which resonant MEC is achieved is reduced far below 1 GHz by the application of a small in-plane magnetic field. Moreover, the resonance, observable by attenuation and velocity changes of the SAW, can be switched on and off by a small (0.1∘) angular rotation of this in-plane field. This angular sensitivity makes SAW-ferromagnet devices attractive for sensing applications, such as wireless, battery-free, and interrogable magnetic-field monitors. Using a simple magnetization dynamics model that takes into account the Fe magnetic anisotropy and the softening of the magnetic precession modes, we are able to describe the observed salient features.

Dates et versions

hal-02271517 , version 1 (26-08-2019)

Identifiants

Citer

J.-Y. Duquesne, P. Rovillain, C. Hepburn, M. Eddrief, P. Atkinson, et al.. Surface-Acoustic-Wave Induced Ferromagnetic Resonance in Fe Thin Films and Magnetic Field Sensing. Physical Review Applied, 2019, 12 (2), ⟨10.1103/PhysRevApplied.12.024042⟩. ⟨hal-02271517⟩
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