Article Dans Une Revue Journal of Applied Physics Année : 2002

Switching the magnetic configuration of a spin valve by current-induced domain wall motion

Résumé

We present experimental results on the displacement of a domain wall by injection of a dc current through the wall. The samples are 1-mm-wide long stripes of a CoO/Co/Cu/NiFe classical spin-valve structure. The stripes have been patterned by electron-beam lithography. A neck has been defined at 1/3 of the total length of the stripe and is pinning center for the domain walls, as shownby the steps of the giant magnetoresistance curves at intermediate levels~1/3 or 2/3 between the resistances corresponding to the parallel and antiparallel configurations. We show by electric transport measurements that, once a wall is trapped, it can be moved by injecting a dc current higher than a threshold current of the order of magnitude of 107A/cm2. We discuss the different possible origins of this effect, i.e., local magnetic field created by the current and/or spin transfer from spin-polarized current

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hal-02949465 , version 1 (25-09-2020)

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J. Grollier, D Lacour, V. Cros, A. Hamzic, A. Vaurès, et al.. Switching the magnetic configuration of a spin valve by current-induced domain wall motion. Journal of Applied Physics, 2002, 92 (8), pp.4825-4827. ⟨10.1063/1.1507820⟩. ⟨hal-02949465⟩
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