Schäffer A. F., Wätzel J., and Berakdar J.
Proc. Spie 9931, pp 99311B-1 (2016)Magnetic switching by circular polarized laser pulses is a promising tool for an ultrafast control of magnetism without the need for external magnetic elds. A principle limitation of the spatial resolution is set by the optical diff raction limit which is a clear disadvantage in view of the trend towards nanoscale magnetic structures to achieve high density storage. Here we suggest to exploit the light-matter interaction to achieve atomistic spatial and femtosecond temporal resolutions. The idea is to drive current loops in fullerenes attached to a scanning tip by virtue of femtosecond optical vortices. Using full- fledge quantum simulations we calculate the magnetic fi eld associated with the fullerenes current loops and employ this magnetic fi eld for ferromagnetic resonance studies on magnetic adatoms.
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