Two types of all-optical magnetization switching mechanisms using femtosecond laser pulses

Abstract : Using a time-dependent electrical investigation of the all-optical switching in ferrimagnetic and ferromagnetic Hall crosses via the anomalous Hall effect, intriguing insights into the rich physics underlying the all-optical switching are provided. We demonstrate that two different all-optical magnetization switching mechanisms can be distinguished; a " single pulse " switching for ferrimagnetic GdFeCo alloys, and a " two regimes " switching process for both ferrimagnetic TbCo alloys and ferromagnetic Pt/Co multilayers. We show that the latter takes place at two different time scales, and consists of a steplike helicity-independent multiple-domain formation within the first 1 ms followed by a helicity-dependent remagnetization on several tens of milliseconds.
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Physical Review B : Condensed matter and materials physics, American Physical Society, 2016, 94 (6), pp.064412. 〈10.1103/PhysRevB.94.064412〉
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Soumis le : mardi 12 décembre 2017 - 16:15:25
Dernière modification le : jeudi 11 janvier 2018 - 06:23:10

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M Hadri, P. Pirro, C.-H. Lambert, Sébastien Petit-Watelot, Y. Quessab, et al.. Two types of all-optical magnetization switching mechanisms using femtosecond laser pulses. Physical Review B : Condensed matter and materials physics, American Physical Society, 2016, 94 (6), pp.064412. 〈10.1103/PhysRevB.94.064412〉. 〈hal-01654228〉

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