Fig. 1: Magnon dispersion of iron shown for wave vectors in reciprocal space.

Fig. 1: The magnon dispersion of iron shown for wave vectors in reciprocal space. The colors show the temperature of the magnon modes during the electron-magnon excitation process. The laser pulse hits the electrons at time t = 0. The consecutive upward-shifted dispersion curves show the time evolution of the wave-vector dependent magnon temperatures.