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Variable damping and coherence in a high-density magnon gas | | S. Schäfer
; V. Kegel
; A.A. Serga
; B. Hillebrands
; | | Date: |
12 Jul 2010 | | Abstract: | We report on the fast relaxation behavior of a high-density magnon gas,
created by a parametric amplification process. The magnon gas is probed using
the technique of spin-wave packet recovery by parallel parametric pumping.
Experimental results show a damping behavior deviating both from the classical
Gilbert model and observations of non-linear damping described so far. In
particular, the inherent magnon damping is found to depend upon the presence of
the parametric pumping field. The data is supported by a phenomenological
model, taking into account the influence of the parametric pumping on
non-linear damping, as well as the dephasing of the previously injected
magnons. | | Source: | arXiv, 1007.1895 | | Services: | Forum | Review | PDF | Favorites | |
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