@article{Kazantseva2008recov-9164,
  year={2008},
  doi={10.1209/0295-5075/81/27004},
  title={Slow recovery of the magnetisation after a sub-picosecond heat pulse},
  volume={81},
  journal={Europhysics Letters},
  author={Kazantseva, Natalia and Nowak, Ulrich and Chantrell, Roy W. and Hohlfeld, Julius and Rebei, Adnan},
  note={Article Number: 27004}
}

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    <dc:contributor>Kazantseva, Natalia</dc:contributor>
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    <dc:contributor>Nowak, Ulrich</dc:contributor>
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    <dc:contributor>Hohlfeld, Julius</dc:contributor>
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    <dc:contributor>Chantrell, Roy W.</dc:contributor>
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    <dcterms:abstract xml:lang="eng">The response of a magnetic spin system to pulsed laser heating on time scales in the picosecond regime is investigated using an atomic level classical spin Hamiltonian, the dynamics of which are based on the stochastic Landau-Lifshitz-Gilbert equation. It is found that the ferro- to paramagnetic phase transition can occur in less than one picosecond, in agreement with published experimental data. Calculating the spin temperature via the internal energy of the spin system we find that the system does not necessarily fully demagnetize even for spin temperatures above the Curie temperature. Our findings suggest that the spin system is far from thermal equilibrium so that the concept of a spin temperature has to be questioned on the time scale of picoseconds. Most importantly, the time for recovery of the magnetization can vary by orders of magnitude depending on the magnetic state after heating, a prediction which is verified by supporting pumpprobe experiments.</dcterms:abstract>
    <dcterms:bibliographicCitation>First publ. in: Europhysics Letters 81 (2008), 27004</dcterms:bibliographicCitation>
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    <dc:creator>Rebei, Adnan</dc:creator>
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    <dc:creator>Chantrell, Roy W.</dc:creator>
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