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Thermally assisted all-optical helicity dependent magnetic switching in amorphous Fe100-xTbx alloy films.

Hassdenteufel, A.; Hebler, B.; Schubert, C.; Liebig, A.; Teich, M.; Helm, M.; Aeschlimann, M.; Albrecht, M.; Bratschitsch, R.

Abstract

All-optical switching (AOS) in ferrimagnetic Fe100−x Tbx alloys is presented. AOS is witnessed below, above, and in samples without a magnetic compensation point. It is found that AOS is associated with laser heating up to the Curie temperature and intimately linked to a low remanent sample magnetization. Above a threshold magnetization of 220 emu cm−3 helicity dependent AOS is replaced by pure thermal demagnetization.

Keywords: all optical switching; magnetic switching; ferrimagnetism

Permalink: https://www.hzdr.de/publications/Publ-18696