Connecting the timescales in picosecond remagnetization experiments

Details Connecting the timescales in picosecond remagnetization experiments Connecting the timescales in picosecond remagnetization experiments

2006-08-02

arxiv.org/abs/cond-mat/0608063v2

Phys. Rev. B 75, 012404 (2007)

Physics

Condensed Matter

Other Condensed Matter

12 pages, 3 figures, submitted to Phys. Rev. Lett, changes made with regard to review process

Scientific paper

10.1103/PhysRevB.75.012404

In femtosecond demagnetization experiments, one gains access to the elementary relaxation mechanisms of a magnetically ordered spin system on a time scale of 100 fs. Following these experiments, we report a combined micromagnetic and experimental study that connects the different regimes known from all-optical pump-probe experiments by employing a simple micromagnetic model. We identify spin-wave packets on the nanometer scale that contribute to the remagnetization process on the intermediate time scale between single-spin relaxation and collective precession.

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