title: Spin-wave quantization in ferromagnetic nickel nanowires.
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.
authors.affiliation: Department of Physics, National University of Singapore, Singapore 117542, Republic of Singapore.
authors.forename: Z K
authors.initials: ZK
authors.lastname: Wang
authors.forename: M H
authors.initials: MH
authors.lastname: Kuok
authors.forename: S C
authors.initials: SC
authors.lastname: Ng
authors.forename: D J
authors.initials: DJ
authors.lastname: Lockwood
authors.forename: M G
authors.initials: MG
authors.lastname: Cottam
authors.forename: K
authors.initials: K
authors.lastname: Nielsch
authors.forename: R B
authors.initials: RB
authors.lastname: Wehrspohn
authors.forename: U
authors.initials: U
authors.lastname: Gösele