Ultrafast EUV imaging reveals magnetic domain walls in ferro- and ferrimagnetic films remain invariant in position, shape, and width during up to 50% demagnetization.
Ultrafast Spin Dynamics in Nickel
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abstract
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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cond-mat.mtrl-sci 1years
2025 1verdicts
UNVERDICTED 1representative citing papers
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Revealing domain wall stability during ultrafast demagnetization
Ultrafast EUV imaging reveals magnetic domain walls in ferro- and ferrimagnetic films remain invariant in position, shape, and width during up to 50% demagnetization.