Gilbert damping in NiFeGd compounds: Ferromagnetic resonance versus time-resolved spectroscopy

作者：Ruslan Salikhov, Alexandr Alekhin, T. Parpiiev, Thomas Pézeril, Denys Makarov, Radu Abrudan, R. Meckenstock, Florin Radu, Michael Farle, H. Zabel, Vasily V. Temnov · 发表于：Physical review. B./Physical review. B · 年份：2019 · DOI：10.1103/physrevb.99.104412 · 被引用次数：26 · 研究领域：Magnetic properties of thin films、Magnetic Properties and Applications、Magneto-Optical Properties and Applications

Engineering the magnetic properties (Gilbert damping, saturation magnetization, exchange stiffness, and magnetic anisotropy) of multicomponent magnetic compounds plays a key role in fundamental magnetism and its applications. Here, we perform a systematic study of ${({\mathrm{Ni}}_{81}{\mathrm{Fe}}_{19})}_{100\ensuremath{-}x}{\mathrm{Gd}}_{x}$ films with $x=0%$, 5%, 9%, and $13%$ using ferromagnetic resonance (FMR), element-specific time-resolved x-ray magnetic resonance, and femtosecond time-resolved magneto-optical pump-probe techniques. The comparative analysis of field and time domain FMR methods, with complimentary information extracted from the dynamics of high-frequency exchange magnons in ferromagnetic thin films, is used to investigate the dependence of Gilbert damping on the Gd concentration.