Tuning of the nucleation field in nanowires with perpendicular magnetic anisotropy

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Autor/in:
Erscheinungsjahr:
2013
Medientyp:
Text
Schlagworte:
  • Domain walls
  • Torque
  • Torque SOT
  • Magnetic Anisotropy
  • Magnetization
  • Magnetism
  • Domain walls
  • Torque
  • Torque SOT
  • Magnetic Anisotropy
  • Magnetization
  • Magnetism
Beschreibung:
  • We report on domain nucleation in nanowires consisting of Co/Pt multilayers with perpendicular magnetic anisotropy that are patterned by electron-beam lithography, sputter deposition, and lift-off processing. It is found that the nucleation field can be tuned by changing the geometry of the wire ends. A reduction of the nucleation field by up to 60 is achieved when the wire ends are designed as tips. This contrasts with the behavior of wires with in-plane anisotropy where the nucleation field increases when triangular-pointed ends are used. In order to clarify the origin of the reduction of the nucleation field, micromagnetic simulations are employed. The effect cannot be explained by the lateral geometrical variation but is attributable to a local reduction of the perpendicular anisotropy caused by shadowing effects due to the resist mask during sputter deposition of the multilayer. © 2013 AIP Publishing LLC.
Lizenz:
  • info:eu-repo/semantics/restrictedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/2e72bac4-7bee-4d66-981a-42e7f8e7b0e9