Spin dynamics in ferromagnets : Gilbert damping and two-magnon scattering

  title={Spin dynamics in ferromagnets : Gilbert damping and two-magnon scattering},
  author={Kh. Zakeri and J{\"u}rgen Lindner and Igor Barsukov and Ralf Meckenstock and Michael Farle and U. von H{\"o}rsten and Heiko Wende and Werner Keune and Jan Rocker and Sangita S. Kalarickal and Kilian Lenz and Wolfgang Kuch and Klaus Baberschke and Zdeněk Frait},
  journal={Physical Review B},
The magnetic relaxation processes following the dynamical excitation of the spin system of ferromagnets are investigated by ferromagnetic resonance (FMR) between 1 and $70\phantom{\rule{0.3em}{0ex}}\mathrm{GHz}$ using epitaxial ${\mathrm{Fe}}_{3}\mathrm{Si}$ films as a prototype system. Two relaxation channels, i.e., dissipative, isotropic Gilbert damping $G$ as well as anisotropic two-magnon scattering $\ensuremath{\Gamma}$, are simultaneously identified by frequency and angle dependent FMR… 

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