• Letter

Magnetoelastic Gilbert damping in magnetostrictive Fe0.7Ga0.3 thin films

W. K. Peria, X. Wang, H. Yu, S. Lee, I. Takeuchi, and P. A. Crowell
Phys. Rev. B 103, L220403 – Published 8 June 2021
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    Abstract

    We report an enhanced magnetoelastic contribution to the Gilbert damping in highly magnetostrictive Fe0.7Ga0.3 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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    • Received 12 March 2021
    • Revised 17 May 2021
    • Accepted 25 May 2021

    DOI:https://doi.org/10.1103/PhysRevB.103.L220403

    ©2021 American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    MagnetismMagnetization dynamicsMagnetoelastic effect
    1. Physical Systems
    Ferromagnets
    1. Techniques
    Ferromagnetic resonance
    Condensed Matter, Materials & Applied Physics

    Authors & Affiliations

    W. K. Peria1, X. Wang2, H. Yu2, S. Lee2,3, I. Takeuchi2, and P. A. Crowell1,*

    • 1School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
    • 2Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA
    • 3Department of Physics, Pukyong National University, Busan 48513, South Korea

    • *Author to whom correspondence should be addressed: crowell@umn.edu

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    Issue

    Vol. 103, Iss. 22 — 1 June 2021

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