Speaker
Mr
Manuel Baumgartner
(ETH Zürich)
Description
Current-induced spin-orbit torques (SOTs) represent one of the most effective ways to manipulate the magnetization in spintronic devices. The orthogonal torque-magnetization geometry and the large domain wall velocities inherent to materials with strong spin-orbit coupling make SOTs appealing for fast switching applications in nonvolatile memory and logic units. Here, we report the first direct observation of SOT-driven magnetization dynamics in Pt/Co/AlOx dots during current pulse injection. Time-resolved x-ray images with 25 nm spatial and 100 ps temporal resolution reveal that switching is achieved by fast nucleation of an inverted domain at the edge of the dot and propagation of a tilted domain wall across the dot.
Authors
Mr
Manuel Baumgartner
(ETH Zürich)
Dr
Pietro Gambardella
(ETH Zürich)
Co-authors
Dr
Kevin Garello
(IMEC)
Mr
Johannes Mendil
(ETH Zürich)
Dr
Can Onur Avci
(ETH Zürich)
Dr
Eva Grimaldi
(ETH Zürich)
Mr
Christoph Murer
(ETH Zürich)
Mr
Junxiao Feng
(ETH Zürich)
Dr
Mihai Gabureac
(ETH Zürich)
Dr
Stamm Christian
(ETH Zürich)
Dr
Yves Acremann
(ETH Zürich)
Dr
Simone Finizio
(PSI)
Dr
Sebastian Wintz
(PSI)
Dr
Jörg Raabe
(PSI)
