Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 26, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4773508
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- European Community [214810]
- EU European Regional Development Fund, OPIE
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We report on modulation of the spin precession in a Co/garnet bilayer by femtosecond laser excitation using time-resolved magneto-optical tools. Damped oscillations in the Faraday rotation transients representing precessional motion of the magnetization vector are observed in both the 2 nm Co layer and 1.8 mu m garnet of the bilayer with distinct frequencies differing by about a factor of two. The excitation efficiency of these precessions strongly depends on the out-of-plane magnetic field. The modulation effect with the coupling in a magnetic bilayer can be useful for non-thermally controlling the magnetization of nanomagnets and ultrafast switching in magnetic nanodevices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4773508]
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