Ultrafast Spin Dynamics in Nickel

Details Ultrafast Spin Dynamics in Nickel Ultrafast Spin Dynamics in Nickel

1997-09-24

arxiv.org/abs/cond-mat/9709264v1

Physics

Condensed Matter

Materials Science

4 pages, Latex, 4 postscript figures

Scientific paper

10.1103/PhysRevB.58.R5920

The spin dynamics in Ni is studied by an exact diagonalization method on the ultrafast time scale. It is shown that the femtosecond relaxation of the magneto-optical response results from exchange interaction and spin-orbit coupling. Each of the two mechanisms affects the relaxation process differently. We find that the intrinsic spin dynamics occurs during about 10 fs while extrinsic effects such as laser-pulse duration and spectral width can slow down the observed dynamics considerably. Thus, our theory indicates that there is still room to accelerate the spin dynamics in experiments.

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