Magnetoelastic Gilbert damping in magnetostrictive Fe${}_{0.7}$Ga${}_{0.3}$ thin films

Abstract

We report an enhanced magnetoelastic contribution to the Gilbert damping in highly magnetostrictive Fe${}_{0.7}$Ga${}_{0.3}$ thin films. This effect is mitigated for perpendicular-to-plane fields, leading to a large anisotropy of the Gilbert damping in all of the films (up to a factor of 10 at room temperature). These claims are supported by broadband measurements of the ferromagnetic resonance linewidths over a range of temperatures (5 to 400 K), which serve to elucidate the effect of both the magnetostriction and phonon relaxation on the magnetoelastic Gilbert damping.

arXiv comment13 pages, 12 figures

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Cited by in corpus (3)

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• Room-Temperature Intrinsic and Extrinsic Damping in Polycrystalline Fe Thin Films
• Anomalous temperature dependence of phonon pumping by ferromagnetic resonance in Co/Pd multilayers with perpendicular anisotropy