Helicity and field dependent magnetization dynamics of ferromagnetic Co/Pt multilayers
Helicity and field dependent magnetization dynamics of ferromagnetic Co/Pt multilayers
Tsema, Y.; Kichin, G.; Hellwig, O.; Mehta, V.; Kimel, A. V.; Kirilyuk, A.; Rasing, T.
We present helicity and field dependent magnetization dynamics of ferromagnetic Co/Pt multilayers, suitable for all-optical helicity-dependent switching. Employing single-shot time-resolved magnetooptical Kerr effect imaging, our study demonstrates an ultra-fast quenching of the magnetization after a single 60 fs laser pulse excitation followed by a recovery. Full demagnetization occurs within 1 ps after laser excitation. The magnetization dynamics reveals a small helicity dependence caused by magnetic circular dichroism. When an external magnetic field is applied, a heat-assisted magnetization reversal occurs on a nanosecond time scale.
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Applied Physics Letters 109(2016), 072405
DOI: 10.1063/1.4961246
Cited 26 times in Scopus
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