Abstract-Sub-100-ps dynamics of the anomalous Hall effect at terahertz frequencies

T. J. Huisman, R. V. Mikhaylovskiy, Th. Rasing, A. V. Kimel, A. Tsukamoto, B. de Ronde, L. Ma, W. J. Fan, and S. M. Zhou

Phys. Rev. B 95, 094418 – Published 13 March 2017

https://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.094418

We report about the anomalous Hall effect in $4f3d$ metallic alloys measured using terahertz time-domain spectroscopy. In this way, we succeeded in revealing ultrafast dynamics of the anomalous Hall effect which accompanies the sub-100-ps optically induced magnetization reversal in a GdFeCo alloy. The experiments demonstrate the ability to control currents at terahertz frequencies in spintronic devices magnetically and ultrafast.

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