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The ultimate speed limit for all-optical spin manipulation requires control schemes on the timescale of the laser excitation pulse. In our work, we provide experimental evidence of such a direct, ultrafast and coherent spin transfer between distinct magnetic subsystems in ferromagnetic Ni-Fe alloys and Heusler compounds. Our experimental findings are fully supported by time dependent density functional theory simulations and, hence, suggests the possibility of coherently controlling spin dynamics on sub-femtosecond timescales.
Stefan Mathias
"Ultrafast optically-induced spin transfer in ferromagnetic alloys and compounds (Conference Presentation)", Proc. SPIE PC12205, Spintronics XV, PC122050A (4 October 2022); https://doi.org/10.1117/12.2634137
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Stefan Mathias, "Ultrafast optically-induced spin transfer in ferromagnetic alloys and compounds (Conference Presentation)," Proc. SPIE PC12205, Spintronics XV, PC122050A (4 October 2022); https://doi.org/10.1117/12.2634137