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Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2016

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

Charles-Henri Lambert
  • Function : Author
  • PersonId : 777023
  • IdRef : 188414258
S. Petit-Watelot
Michel Hehn
François Montaigne
Grégory Malinowski
Stéphane Mangin

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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Dates and versions

hal-01381232 , version 1 (14-10-2016)

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Mohammed Salah El Hadri, Philipp Pirro, Charles-Henri Lambert, S. Petit-Watelot, Yassine Quessab, et al.. Two types of all-optical magnetization switching mechanisms using femtosecond laser pulses. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016, 94 (6), pp.064412. ⟨10.1103/PhysRevB.94.064412⟩. ⟨hal-01381232⟩
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