Current-Induced Magnetization Reversal in High Magnetic Fields in Co/Cu/Co Nanopillars

Preprint

23 January 2003

preprint
Published by arXiv in arXiv

Abstract

Current-induced magnetization dynamics in Co/Cu/Co trilayer nanopillars (~100nm in diameter) has been studied experimentally for large applied fields perpendicular to the layers. An abrupt and hysteretic increase in dynamic resistance is observed at high current densities for one polarity of the current, comparable to the giant magnetoresistance effect observed at low fields. A micromagnetic model, that includes a spin-transfer torque, suggests that the current induces a complete reversal of the thin Co layer to alignment antiparallel to the applied field-that is, to a state of maximum magnetic energy.

Keywords

CURRENT INDUCED MAGNETIZATION
GIANT MAGNETORESISTANCE
MAGNETIZATION DYNAMICS
INDUCED MAGNETIZATION
SPIN TRANSFER TORQUE
APPLIED FIELD
NANOPILLARS
MAGNETIC
CO/CU/CO

All Related Versions

Version 1, 2003-01-17, ArXiv
Version 2, 2003-01-19, ArXiv
Version 3, 2003-01-23, ArXiv
Version 4, 2003-09-04, ArXiv
Published version: Physical Review Letters, 91 (6), 067203.

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