| Issue |
Europhys. Lett.
Volume 56, Number 5, December 2001
|
|
|---|---|---|
| Page(s) | 748 - 754 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00584-7 | |
| Published online | 01 December 2003 | |
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: jean-eric.wegrowe@epfl.ch
Received:
2
March
2001
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
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