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Magnetization dynamics

Ferromagnets stirred up

Conflicting observations of the speed at which various ferromagnetic materials respond to an external femtosecond laser excitation have generated considerable controversy. It is now shown that ferromagnets can be divided in two categories, according to the values of specific magnetic parameters.

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Figure 1: Frozen image of a heated-up ferromagnet.
Figure 2: Insight into elementary mechanisms.

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Münzenberg, M. Ferromagnets stirred up. Nature Mater 9, 184–185 (2010). https://doi.org/10.1038/nmat2706

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