论文信息 - Switching a spin valve back and forth by current-induced domain wall motion

Switching a spin valve back and forth by current-induced domain wall motion

We have studied the current-induced displacement of a domain wall (DW) in the permalloy (Py) layer of a Co/Cu/Py spin valve structure at zero and very small applied field. The displacement is in opposite direction for opposite dc currents, and the current density required to move DW is only of the order of 106 A/cm2. For H=3 Oe, a back and forth DW motion between two stable positions is observed. We also discuss the effect of an applied field on the DW motion.

[1] L. Berger. Motion of a magnetic domain wall traversed by fast‐rising current pulses , 1992 .

[2] Ralph,et al. Current-induced switching of domains in magnetic multilayer devices , 1999, Science.

[3] Roger Hilsen Koch,et al. Batch-fabricated spin-injection magnetic switches , 2002 .

[4] Current-controlled bi-stable domain configurations in Ni81Fe19 elements: An approach to magnetic memory devices , 2002 .

[5] Berger. Emission of spin waves by a magnetic multilayer traversed by a current. , 1996, Physical review. B, Condensed matter.

[6] Ralph,et al. Current-driven magnetization reversal and spin-wave excitations in Co /Cu /Co pillars , 1999, Physical review letters.

[7] V. Cros,et al. Switching the magnetic configuration of a spin valve by current-induced domain wall motion , 2002, cond-mat/0206182.

[8] J. Slonczewski. Current-driven excitation of magnetic multilayers , 1996 .

[9] Jean-Eric Wegrowe,et al. Current-induced magnetization reversal in magnetic nanowires , 1999 .

[10] A. Fert,et al. Spin-polarized current induced switching in Co/Cu/Co pillars , 2001 .