Spin-transfer-torque-driven domin-wall dynamics in Permalloy nanowires
- 13 June 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 75 (22), 220403
- https://doi.org/10.1103/physrevb.75.220403
Abstract
Pulse-current-driven domain-wall (DW) dynamics in Permalloy nanowires are studied using high-temporal-resolution magneto-optical techniques. The time-resolved measurements reveal prompt displacements proportional to current density above a well-defined threshold and yield values of DW velocity and spin-flip efficiency that are a factor of 10 higher than those determined in prior experiments. A stochastic variation in the wall displacements associated with termination of the current pulse is observed. The experimental results suggest the presence of both adiabatic and nonadiabatic spin-transfer-torque mechanisms, but do not appear to be fully explained by existing theoretical models.Keywords
This publication has 29 references indexed in Scilit:
- Spin-transfer torque for continuously variable magnetizationPhysical Review B, 2006
- Magnetic Domain-Wall LogicScience, 2005
- Roles of Nonequilibrium Conduction Electrons on the Magnetization Dynamics of FerromagnetsPhysical Review Letters, 2004
- Domain-wall dynamics driven by adiabatic spin-transfer torquesPhysical Review B, 2004
- Domain wall motion by spin-polarized current: a micromagnetic studyJournal of Applied Physics, 2004
- Domain-Wall Dynamics and Spin-Wave Excitations with Spin-Transfer TorquesPhysical Review Letters, 2004
- Thermally assisted magnetization reversal in the presence of a spin-transfer torquePhysical Review B, 2004
- Theory of Current-Driven Domain Wall Motion: Spin Transfer versus Momentum TransferPhysical Review Letters, 2004
- Spintronics: A Spin-Based Electronics Vision for the FutureScience, 2001
- MagnetoelectronicsScience, 1998