Current-induced domain-wall motion in permalloy semi rings

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Erscheinungsjahr:
2007
Medientyp:
Text
Schlagworte:
  • Magnetization dynamics
  • Micromagnetic simulation
  • Spin-transfer torque
Beschreibung:
  • We have incorporated the model of Zhang and Li [Phys. Rev. Lett. 93 (2004) 127204] for spin-transfer torque into the Landau-Lifshitz-Gilbert equation and have investigated the current-induced magnetization dynamics of permalloy (Ni80 Fe20) semi rings. The distribution of the current density within the ring is taken into account. Current-induced eigenmodes with distinct resonance frequencies and higher harmonics are observed as well as a dependence of the resonance frequency on the ring radius. The domain-wall mass determined from the micromagnetic simulation and an analytical model is in agreement with recent experiments. Maximum domain-wall velocities between 30 and 34 ms- 1 are deduced. © 2007 Elsevier B.V. All rights reserved.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/e89cc632-2af5-4d98-aedd-c1c3219954ee