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

We use element-resolved IR-pump/extreme ultraviolet-probe experiments to disentangle the ultrafast interplay of the magnetic sublattices in the case of the FeRh alloy, which shows a delayed response for the different components.  S. Günther et al., doi.org/10.1103/PhysRevB.90.180407

 




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.

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Testing spin-flip scattering as a possible mechanism of ultrafast demagnetization in ordered magnetic alloys, S. Günther et al., doi.org/10.1103/PhysRevB.90.180407
 
 
 
 
Last Updated on Friday, 23 June 2017 14:36