Speaker
Yves Marc Acremann
(ETH Zurich)
Description
The generation of spin current pulses by laser-driven demagnetization links the field of ultrafast magnetism to spintronics. We demonstrate that femtosecond spin injection can be observed by spin and time resolved photoemission experiments.
We study iron films which are excited by a 800 nm pump laser beam. Photoemission by a HHG source in combination with a spin polarimeter is used to measure the spin-split chemical potentials. We observe the spin voltage, the driving force for the spin current.
If we cap our sample with a gold layer, we can study spin injection and accumulation. The thickness dependence of the observed dynamics can be described by a “spin capacitance”.
Authors
Prof.
Andreas Vaterlaus
(ETH Zurich)
Mr
Francisco Carrión
(ETH Zurich)
Dr
Kevin Bühlmann
(ETH Zurich)
Yves Marc Acremann
(ETH Zurich)
