Speaker
Dr
Christian Stamm
(ETHZ - ETH Zurich)
Description
The spin Hall effect in a current-carrying wire leads to the accumulation of spins at the outer edges of the wire. We detect this spin imbalance by magneto-optical Kerr microscopy and find that the Kerr rotation for Pt and W has opposite sign, as expected from the respective spin Hall angles. The measured spin accumulation scales linearly with the applied current density. In thickness-dependent measurements as well as in ab-initio calculations we find a spin diffusion length in Pt of $9 \pm 2$ nm, significantly larger compared to a Pt film that is in contact with a magnetic layer.
Author
Dr
Christian Stamm
(ETHZ - ETH Zurich)
Co-authors
Christoph Murer
(ETH Zürich)
Mr
Marco Berritta
(Department of Physics and Astronomy, Uppsala University)
Mr
Junxiao Feng
(Department of Materials, ETH Zürich)
Mr
Mihai Gabureac
(Department of Materials, ETH Zürich)
Prof.
Peter Oppeneer
(Department of Physics and Astronomy, Uppsala University)
Prof.
Pietro Gambardella
(Department of Materials, ETH Zürich)
