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

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

Článek WoS

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.

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.

ultrafast demagnetization; pump-probe; spin-flip scattering

ultrafast demagnetization; pump-probe; spin-flip scattering

Günther, S.; Spezzani, C.; Ciprian, R.; Grazioli, C.; Ressel, B.; Coreno, M.; Poletto, L.; Miotti, P.; Sacchi, M.; Panaccione, G.; Uhlíř, V.; Fullerton, E.; De Ninno, G.; Back, C.

2019

21.11.2014

1098-0121

PHYSICAL REVIEW B

90

18

Spojené státy americké

180407-1

180407-5

5

Guenther-Testing spin-flip scattering as a possible mechanism of ultrafast demagnetization in ordered magnetic alloys PRB 14