Role of temperature-dependent spin model parameters in ultra-fast magnetization dynamics

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2017
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Deák, András
Szunyogh, László
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European Union (EU): 281043
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FEMTOSPIN - Multiscale Modelling of Femtosecond Spin Dynamics
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Journal of Physics : Condensed Matter. 2017, 29(31), 314003. ISSN 0953-8984. eISSN 1361-648X. Available under: doi: 10.1088/1361-648X/aa76fc
Zusammenfassung

In the spirit of multi­scale modelling magnetization dynamics at elevated temperature is often simulated in terms of a spin model where the model parameters are derived from first principles. While these parameters are mostly assumed temperature­independent and thermal properties arise from spin fluctuations only, other scenarios are also possible. Choosing bcc Fe as an example, we investigate the influence of different kinds of model assumptions on ultra­ fast spin dynamics, where following a femtosecond laser pulse, a sample is demagnetized due to a sudden rise of the electron temperature. While different model assumptions do not affect the simulational results qualitatively, their details do depend on the nature of the modelling.

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530 Physik
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magnetic interactions, Curie temperature, atomistic spin model, spin dynamics, ultra­fast magnetization dynamics
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ISO 690DEÁK, András, Denise HINZKE, László SZUNYOGH, Ulrich NOWAK, 2017. Role of temperature-dependent spin model parameters in ultra-fast magnetization dynamics. In: Journal of Physics : Condensed Matter. 2017, 29(31), 314003. ISSN 0953-8984. eISSN 1361-648X. Available under: doi: 10.1088/1361-648X/aa76fc
BibTex
@article{Deak2017tempe-39854,
  year={2017},
  doi={10.1088/1361-648X/aa76fc},
  title={Role of temperature-dependent spin model parameters in ultra-fast magnetization dynamics},
  number={31},
  volume={29},
  issn={0953-8984},
  journal={Journal of Physics : Condensed Matter},
  author={Deák, András and Hinzke, Denise and Szunyogh, László and Nowak, Ulrich},
  note={Article Number: 314003}
}
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