A Circuit Model for Domain Walls in Ferromagnetic Nanowires: Application to Conductance and Spin Transfer Torques

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dc.creatorFalloon, Peter E.
dc.creatorJalabert, Rodolfo A.
dc.creatorWeinmann, Dietmar
dc.creatorStamps, Robert L.
dc.date2004-06-03
dc.date.accessioned2026-07-07T02:58:27Z
dc.date.available2026-07-07T02:58:27Z
dc.descriptionWe present a circuit model to describe the electron transport through a domain wall in a ferromagnetic nanowire. The domain wall is treated as a coherent 4-terminal device with incoming and outgoing channels of spin up and down and the spin-dependent scattering in the vicinity of the wall is modelled using classical resistances. We derive the conductance of the circuit in terms of general conductance parameters for a domain wall. We then calculate these conductance parameters for the case of ballistic transport through the domain wall, and obtain a simple formula for the domain wall magnetoresistance which gives a result consistent with recent experiments. The spin transfer torque exerted on a domain wall by a spin-polarized current is calculated using the circuit model and an estimate of the speed of the resulting wall motion is made.
dc.description10 pages, 5 figures; submitted to Physical Review B
dc.identifierhttps://arxiv.org/abs/cond-mat/0406076
dc.identifierhttp://arxiv.org/abs/cond-mat/0406076
dc.identifierPhys. Rev. B 70, 174424 (2004)
dc.identifierdoi:10.1103/PhysRevB.70.174424
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24100
dc.subjectMesoscale and Nanoscale Physics
dc.titleA Circuit Model for Domain Walls in Ferromagnetic Nanowires: Application to Conductance and Spin Transfer Torques
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