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

Article

关键词: SPIN-TORQUE;    THIN-FILMS;    REVERSAL;    MANIPULATION;   

DOI  :  10.1103/PhysRevB.94.064412

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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