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Athermal all-optical femtosecond magnetization reversal in GdFeCo
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View: Figures


Image of FIG. 1.
FIG. 1.

Transient magnetization dynamics induced by circularly polarized pump pulses with helicity favoring the initial orientation of the magnetization (NSW, open symbols) and leading to magnetization reversal (SW, closed symbols). The inset shows the resulting dynamics of the normalized out-of-plane component of the magnetization, , obtained by dividing the transient for the switching case by the one for the nonswitching configuration. The line is to guide the eye and represents an error function of 700 fs width.

Image of FIG. 2.
FIG. 2.

All-optical switching of magnetization as a function of temperature, in GdFeCo. Black and white areas correspond to oppositely oriented magnetic domains, perpendicular to the sample plain. The dotlike magnetic domain was created in order to indicated the laser beam location onto the sample, at 300 K. The switching behavior as a function of temperature has been investigated at a laser fluence of . For this laser fluence no switching is observed at room temperature but it becomes visible only when the temperature is reduced below 250 K.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Athermal all-optical femtosecond magnetization reversal in GdFeCo