Collective spin waves in high-density two-dimensional arrays of FeCo nanowires

Nano Lett. 2006 Jun;6(6):1083-6. doi: 10.1021/nl060026+.

Abstract

Brillouin measurements have been made of the spin dynamics of high-density two-dimensional hexagonally ordered 20 nm diameter Fe48Co52 nanowire arrays, with various interwire spacings, as a function of longitudinal magnetic field. The experimental data are analyzed within the Arias-Mills theory based on interwire dipolar couplings in the arrays. The results provide conclusive evidence of collective spin waves arising from the dipolar coupling which is manifested as a reduction in spin wave frequency with decreasing interwire spacing.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cobalt / analysis
  • Cobalt / chemistry*
  • Crystallization / methods*
  • Electric Impedance
  • Electric Wiring / instrumentation*
  • Iron Compounds / analysis
  • Iron Compounds / chemistry*
  • Magnetics*
  • Materials Testing
  • Molecular Conformation
  • Nanotechnology / instrumentation
  • Nanotechnology / methods*
  • Nanotubes / chemistry*
  • Nanotubes / ultrastructure
  • Particle Size
  • Spin Labels

Substances

  • Iron Compounds
  • Spin Labels
  • Cobalt