Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 23: Micro- and Nanostructured Magnetic Materials III
MA 23.10: Vortrag
Donnerstag, 25. März 2010, 12:30–12:45, H3
Switching monolayer Fe islands on NiAl by spin polarized current. — •Frank Dietermann1 and Ruqian Wu2 — 1Max-Planck Institute for Metals Research, Heisenbergstr. 3, D-70569 Stuttgart, Germany — 2University of Irvine, Irvine, CA, United States of America
A preliminary investigation into spin-torque induced switching processes of very small (2-3nm) monolayer Fe islands on NiAl is reported. A rough estimate for the minimum spin-polarized current where switching occurs is obtained through dynamic simulations of the atomic moments. The simulation takes the Heisenberg interaction, dipole fields and the adiabatic spin torque into account, and numerically solves the Landau-Lifshitz-Gilbert equation through Runge-Kutta-Fehlberg methods. A rather large discrepancy to the experimental observations is discussed and a very simple explanation proposed.