Role of spin-orbit interaction in the ultrafast demagnetization of small iron clusters

  title={Role of spin-orbit interaction in the ultrafast demagnetization of small iron clusters},
  author={Maria Stamenova and Jacopo Simoni and Stefano Sanvito},
  journal={Physical Review B},
The ultra-fast demagnetization of small iron clusters initiated by an intense optical excitation is studied with time-dependent spin density functional theory (TDSDFT). In particular we investigate the effect of the spin-orbit interaction on the onset of the demagnetization process. It is found that the initial rate of coherent spin loss is proportional to the square of the atomic spin-orbit coupling constant, $\lambda$. A simplified quantum spin model comprising spin-orbit interaction and a… 

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