Ferromagnetic resonance linewidth and two-magnon scattering in Fe1-xGdx thin films | Zendy

Sheng Jiang | Zendy; Li Sun | Zendy; Yuli Yin | Zendy; Yu Fu | Zendy; Chen Luo | Zendy; Ya Zhai | Zendy; Hongru Zhai | Zendy

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Ferromagnetic resonance linewidth and two-magnon scattering in Fe1-xGdx thin films

Author(s) -

Sheng Jiang,

Li Sun,

Yuli Yin,

Yu Fu,

Chen Luo,

Ya Zhai,

Hongru Zhai

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4978004

Subject(s) - laser linewidth , condensed matter physics , ferromagnetic resonance , gyromagnetic ratio , materials science , scattering , magnon , magnetization , resonance (particle physics) , thin film , magnetic anisotropy , anisotropy , ferromagnetism , magnetic field , physics , magnetic moment , optics , atomic physics , laser , quantum mechanics , nanotechnology

Magnetization dynamics of Fe1-xGdx thin films (0 ≤ x ≤ 22%) has been investigated by ferromagnetic resonance (FMR). Out-of-plane magnetic field orientation dependence of resonance field and linewidth has been measured. Resonance field and FMR linewidth have been fitted by the free energy of our system and Landau-Lifshitz-Gilbert (LLG) equation. It is found that FMR linewidth contains huge extrinsic components including two-magnon scattering contribution and inhomogeneous broadening for FeGd alloy thin films. In addition, the intrinsic linewidth and real damping constants have been obtained by extracting the extrinsic linewidth. The damping constant enhanced from 0.011 to 0.038 as Gd dopants increase from 0 to 22% which originates from the enhancement of L-S coupling in FeGd thin films. Besides, gyromagnetic ratio, Landé factor g and magnetic anisotropy of our films have also been determined

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