We follow the evolution of the spin and orbital angular momentum of a thin Ni film during ultrafast demagnetization, by means of x-ray magnetic circular dichroism. Both components decrease with a 130±40 fs time constant upon excitation with a femtosecond laser pulse. Additional x-ray absorption measurements reveal an increase in the spin-orbit interaction by 6±2% during this process. This experimental observation of a transient change in spin-orbit interaction provides input for the theoretical modeling of the ultrafast demagnetization mechanism.
No takes yet. Share an insight, caveat, or question.
Stamm et al. (2010) studied this question.
Synapse has enriched 2 closely related papers on similar clinical questions. Consider them for comparative context: