Dresden 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 55: Poster II
MA 55.7: Poster
Freitag, 4. April 2014, 10:30–13:30, P2
Pure spin current-induced domain wall motion probed by localized spin signal detection — Nils Motzko1, Björn Burkhardt1, Robert Reeve1, Alexander Pfeiffer1, •Mathias Kläui1, Piotr Laczkowski2, Williams Savero Torres2, Laurent Vila2, and Jean-Philippe Attane3 — 1Institut für Physik, Johannes Gutenberg Universität Mainz, 55099 Mainz, Germany — 2INAC, CEA Grenoble, 17 av. des Martyrs, 38054 Grenoble, France — 3INAC, CEA Grenoble, 17 av. des Martyrs, 38054 Grenoble, France and Universite Jospeh Fourier, BP 53, 38041 Grenoble, France
We demonstrate the displacement of domain walls by pure diffusive spin currents, using a non-local spin valve geometry without any applied external fields. We detect the position of the domain wall by non-local spin valve measurements at both sides of the spin conduit, thereby detecting the domain wall position that is moving across the area below the spin conduit when a spin current is applied. We find that it is possible to displace a transverse wall without any external field with a spin current density of
6 ·109A/m2, and a charge current density of 4 · 1011A/m2, which is lower than what is required for conventional spin-polarized charge current-induced domain wall motion. The spin polarisation of permalloy was calculated to 31 % and the spin diffusion length to 349 nm. The observed efficiency of 10−12T m2/A is the highest ever obtained for domain walls in permalloy demonstrating that this method is advantageous for low power domain wall manipulation.