Spin-transfer in bilayer magnetic nanopillars at high fields as a function of free layer thickness

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dc.creatorChen, W.
dc.creatorKent, A. D.
dc.creatorRooks, M. J.
dc.creatorRuiz, N.
dc.creatorSun, J. Z.
dc.date2006-02-07
dc.date2007-09-13
dc.date.accessioned2026-07-07T08:29:12Z
dc.date.available2026-07-07T08:29:12Z
dc.descriptionSpin transfer in asymmetric Co/Cu/Co bilayer magnetic nanopillars junctions has been studied at low temperature as a function of free-layer thickness. The phase diagram for current-induced magnetic excitations has been determined for magnetic fields up to 7.5 T applied perpendicular to the junction surface and free-layers thicknesses from 2 to 5 nm. The junction magnetoresistance is independent of thickness. The critical current for magnetic excitations decreases linearly with decreasing free-layer thickness, but extrapolates to a finite critical current in the limit of zero thickness. The limiting current is in quantitative agreement with that expected due to a spin-pumping contribution to the magnetization damping. It may also be indicative of a decrease in the spin-transfer torque efficiency in ultrathin magnetic layers.
dc.description5 Pages, 4 Figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0602159
dc.identifierhttp://arxiv.org/abs/cond-mat/0602159
dc.identifierPhys. Rev. B 74, 144408 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.144408
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/137884
dc.subjectMesoscale and Nanoscale Physics
dc.titleSpin-transfer in bilayer magnetic nanopillars at high fields as a function of free layer thickness
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