Magnetization reversal triggered by spin-polarized current in magnetic nanowires
- 1 December 2001
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 56 (5) , 748-754
- https://doi.org/10.1209/epl/i2001-00584-7
Abstract
It is shown experimentally that a pulsed current driven through a Ni nanowire provokes an irreversible magnetization reversal at a field differing from the spontaneous switching field Hsw by ΔH of as much as 40% of Hsw. The state of the magnetization is assessed by anisotropic magnetoresistance measurements carried out on single, isolated nanowires with and without spin polarizer (Co/Cu multilayers). The parameter ΔH is studied as a function of the angle θ between the applied field and the wire. A shift of about 90° between both profiles ΔH(θ) with and without spin polarizer shows that the observed effect is related to the spin polarization of the current. The results are interpreted with a model of generalized Landau-Lifshitz-Gilbert equation with spin-polarized current.Keywords
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