Abstract
We investigate the influence of spin currents during ultrafast laser-induced demagnetization of magnetic bilayer structures by a new all-optical method to measure material- and/or depth-resolved magnetization dynamics. By describing the magneto-optical response of the bilayers in the complex Kerr plane, it is shown that the material-specific magnetization dynamics of the individual layers can be measured by a marginal adjustment to any conventional time-resolved magneto-optical Kerr effect setup. We use this technique to trace superdiffusive spin currents in magnetic Ni/Fe bilayers, providing new insight on its importance to ultrafast laser-induced demagnetization.
Original language | English |
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Article number | 104429 |
Pages (from-to) | 104429-1/5 |
Journal | Physical Review B |
Volume | 90 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2014 |