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SYAS: Symposium Attosecond and coherent spins: New frontiers

SYAS 1: Attosecond and Coherent Spins: New Frontiers

SYAS 1.5: Invited Talk

Thursday, September 30, 2021, 12:15–12:45, Audimax 2

Ultrafast optically-induced spin transfer in ferromagnetic alloys — •Stefan Mathias — I. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

The idea of using light to manipulate electronic and spin excitations in materials on their fundamental time and length scales requires new approaches in experiment and theory, to observe and understand these excitations. The ultimate speed limit for all-optical manipulation requires control schemes for which the electronic or magnetic sub-systems of the materials are directly manipulated on the timescale of the laser excitation pulse. In our work, we provide experimental evidence of such a direct, ultrafast optically-induced spin transfer between two magnetic subsystems in an alloy of Fe and Ni [1] and various Heusler compounds [2].

[1] Hofherr et al., Ultrafast optically induced spin transfer in ferromagnetic alloys, Science Adv. 6, eaay8717 (2020) [2] Steil et al., Efficiency of ultrafast optically induced spin transfer in Heusler compounds, Physical Review Research 2, 023199 (2020)