Making a reconfigurable artificial crystal by ordering bistable magnetic nanowires

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Autor/in:
Erscheinungsjahr:
2010
Medientyp:
Text
Schlagworte:
  • Spin waves
  • Magnetostatics
  • Magnonic crystal
  • Magnetic Anisotropy
  • Magnetization
  • Magnetism
  • Spin waves
  • Magnetostatics
  • Magnonic crystal
  • Magnetic Anisotropy
  • Magnetization
  • Magnetism
Beschreibung:
  • Spin-wave excitations (magnons) are investigated in a one-dimensional (1D) magnonic crystal fabricated out of Ni80Fe20 nanowires. We find two different magnon band structures depending on the magnetic ordering of neighboring wires, i.e., parallel and antiparallel alignment. At a zero in-plane magnetic field H the modes of the antiparallel case are close to those obtained by zone folding of the spin-wave dispersions of the parallel case. This is no longer true for nonzero H which opens a forbidden frequency gap at the Brillouin zone boundary. The 1D stop band gap scales with the external field, which generates a periodic potential for Bragg reflection of the magnons. © 2010 The American Physical Society.
Lizenz:
  • info:eu-repo/semantics/restrictedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/43838a2e-a986-4fb1-a2a1-594c90cca62b