Two types of all-optical magnetization switching mechanisms using femtosecond laser pulses
Résumé
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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2016-El Hadri- Two types of all-optical magnetization switching mechanisms using femtosecond laser pulses.pdf (1.42 Mo)
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