Variable damping and coherence in a high-density magnon gas
Materials Science
2015-05-19 v3
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 which is in disagreement with both the standard model of exponential decay and with earlier observations of non-linear damping. In particular, the inherent magnon damping is found to depend upon the presence of the parametric pumping field. A phenomenological model which accounts for the dephasing of the earlier injected magnons is in good agreement with the experimental data.
Keywords
Cite
@article{arxiv.1007.1895,
title = {Variable damping and coherence in a high-density magnon gas},
author = {S. Schäfer and V. Kegel and A. A. Serga and M. P. Kostylev and B. Hillebrands},
journal= {arXiv preprint arXiv:1007.1895},
year = {2015}
}