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Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2014

Testing spin-flip scattering as a possible mechanism of ultrafast demagnetization in ordered magnetic alloys

Stefan Guenther
  • Function : Author
Carlo Spezzani
  • Function : Author
Roberta Ciprian
  • Function : Author
Cesare Grazioli
  • Function : Author
Barbara Ressel
  • Function : Author
Marcello Coreno
  • Function : Author
Luca Poletto
  • Function : Author
Paolo Miotti
  • Function : Author
Maurizio Sacchi
Giancarlo Panaccione
  • Function : Author
Vojtech Uhlir
  • Function : Author
Eric E. Fullerton
  • Function : Author
Giovanni de Ninno
  • Function : Author
Christian H. Back
  • Function : Author

Abstract

We use element-resolved IR-pump/extreme ultraviolet-probe experiments to disentangle the ultrafast interplay of the magnetic sublattices of an ordered crystalline magnetic alloy. As a paradigmatic example, we investigate the case of the FeRh alloy, which shows a delayed response for the different components. Furthermore, a detailed time-resolved magneto-optic study shows that the data can be analyzed by only assuming Elliot-Yafet-like scattering, as the underlying mechanism for ultrafast demagnetization, resulting in an unexpected nonmonotonic dependence of the spin-flip rate, as a function of quenching.

Dates and versions

hal-01240508 , version 1 (09-12-2015)

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Stefan Guenther, Carlo Spezzani, Roberta Ciprian, Cesare Grazioli, Barbara Ressel, et al.. Testing spin-flip scattering as a possible mechanism of ultrafast demagnetization in ordered magnetic alloys. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 90 (18), pp.180407. ⟨10.1103/PhysRevB.90.180407⟩. ⟨hal-01240508⟩
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