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

J.-Y. Duquesne | Zendy; P. Rovillain | Zendy; C. Hepburn | Zendy; M. Eddrief | Zendy; P. Atkinson | Zendy; A. Anane | Zendy; R. Ranchal | Zendy; M. Marangolo | Zendy

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

Author(s) -

J.-Y. Duquesne,

P. Rovillain,

C. Hepburn,

M. Eddrief,

P. Atkinson,

A. Anane,

R. Ranchal,

M. Marangolo

Publication year - 2019

Publication title -

physical review applied

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.883

H-Index - 75

eISSN - 2331-7043

pISSN - 2331-7019

DOI - 10.1103/physrevapplied.12.024042

Subject(s) - magnetization , surface acoustic wave , ferromagnetic resonance , magnetic field , materials science , rotation (mathematics) , acoustics , magnetization dynamics , field (mathematics) , ferromagnetism , surface wave , surface acoustic wave sensor , acoustic wave , condensed matter physics , physics , optics , computer science , mathematics , quantum mechanics , artificial intelligence , pure mathematics

Resonant magnetoelastic coupling (MEC) is demonstrated in an Fe thin film epitaxially grown on a piezoelectric GaAs 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 oC) 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.

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