Article Dans Une Revue Physical Review Research Année : 2023

Dynamics of all-optical single-shot switching of magnetization in Tb/Co multilayers

K. Mishra
T G H Blank
C S Davies
R C Sousa
B. Koopmans
A. Kirilyuk

Résumé

Recent works have shown that the magnetization of Tb/Co multilayers can be switched all-optically by a single ultrashort laser pulse. Surprisingly, the same process cannot be achieved in TbCo alloys. Here, we present a plausible explanation for this difference in behavior based on the known treatment of angular momenta and the associated gyromagnetic ratio of rare-earth-based ferrimagnets. We then study in detail the compositiondependent dynamic behavior of the switching process in Tb/Co multilayers using single-shot time-resolved pump-probe experiments. We show that the observed dynamics is strongly dependent on the excitation fluence and multilayer composition and does not fit into the accepted framework describing the single-shot switching process found in Gd-based systems and Mn-containing Heusler alloys.
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hal-04957375 , version 1 (19-02-2025)

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K. Mishra, T G H Blank, C S Davies, L. Avilés-Félix, D. Salomoni, et al.. Dynamics of all-optical single-shot switching of magnetization in Tb/Co multilayers. Physical Review Research, 2023, 5 (2), pp.023163. ⟨10.1103/PhysRevResearch.5.023163⟩. ⟨hal-04957375⟩
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