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Spin-wave quantization in ferromagnetic nickel nanowires
1Department of Physics, National University of Singapore, Singapore 117542, Republic of Singapore.
Physical Review Letters
|July 5, 2002
Abstract:
The dynamical properties of uniform two-dimensional arrays of nickel nanowires have been investigated by inelastic light scattering. Multiple spin waves are observed that are in accordance with dipole-exchange theory predictions for the quantization of bulk spin waves. This first study of the spin-wave dynamics in ferromagnetic nanowire arrays reveals strong mode quantization effects and indications of a subtle magnetic interplay between nanowires. The results show that it is important to take proper account of these effects for the fundamental physics and future technological developments of magnetic nanowires.