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arXiv · 2103.07008

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

William K. Peria·Xinjun Wang·Heshan Yu·Seunghun Lee·Ichiro Takeuchi·Paul A. Crowell
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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.

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William K. Peria, Xinjun Wang, Heshan Yu, Seunghun Lee, Ichiro Takeuchi, Paul A. Crowell. 2021-03-11. Magnetoelastic Gilbert damping in magnetostrictive Fe$_{0.7}$Ga$_{0.3}$ thin films. https://doi.org/10.1103/physrevb.103.l220403

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