Magnetization reversal triggered by spin-polarized current in magnetic nanowires
Institut de Physique Expérimentale, Ecole Polytechnique Fédérale de
Lausanne CH-1015 Lausanne, Switzerland
Corresponding author: email@example.com
Accepted: 6 September 2001
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 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 is studied as a function of the angle between the applied field and the wire. A shift of about between both profiles 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.
PACS: 75.40.Gb – Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) / 75.70.Pa – Giant magnetoresistance / 66.20.+d – Viscosity of liquids; diffusive momentum transport
© EDP Sciences, 2001