Magnetization reversal triggered by spin-polarized current in magnetic nanowires

Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Wegrowe, J-E; Kelly, D; Truong, T; Guittienne, P; Ansermet, J-P

Published Date

  • 2001

Published In

  • Europhysics Letters

Volume / Issue

  • 56 / 5

Start / End Page

  • 748 - 754

Digital Object Identifier (DOI)

  • 10.1209/epl/i2001-00584-7