Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
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- 1 March 2005
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 69 (6), 990-996
- https://doi.org/10.1209/epl/i2004-10452-6
Abstract
In order to explain recent experiments reporting a motion of magnetic domain walls (DW) in nanowires carrying a current, we propose a modification of the spin transfer torque term in the Landau-Lifchitz-Gilbert equation. We show that it explains, with reasonable parameters, the measured DW velocities as well as the variation of DW propagation field under current. We also introduce coercivity by considering rough wires. This leads to a finite DW propagation field and finite threshold current for DW propagation, hence we conclude that threshold currents are extrinsic. Some possible models that support this new term are discussed.Keywords
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This publication has 24 references indexed in Scilit:
- Domain wall displacement induced by subnanosecond pulsed currentApplied Physics Letters, 2004
- Real-Space Observation of Current-Driven Domain Wall Motion in Submicron Magnetic WiresPhysical Review Letters, 2004
- Domain wall propagation in magnetic nanowires by spin-polarized current injectionEurophysics Letters, 2004
- Microwave oscillations of a nanomagnet driven by a spin-polarized currentNature, 2003
- Switching a spin valve back and forth by current-induced domain wall motionApplied Physics Letters, 2003
- Domain wall motion induced by spin polarized currents in ferromagnetic ring structuresApplied Physics Letters, 2003
- Current-Driven Magnetization Reversal and Spin-Wave Excitations in CoCuCo PillarsPhysical Review Letters, 2000
- Erratum: Excitation of a Magnetic Multilayer by an Electric Current [Phys. Rev. Lett. 80, 4281 (1998)]Physical Review Letters, 1998
- Excitation of a Magnetic Multilayer by an Electric CurrentPhysical Review Letters, 1998
- Current-driven excitation of magnetic multilayersJournal of Magnetism and Magnetic Materials, 1996