Wang Z K, Kuok M H, Ng S C, Lockwood D J, Cottam M G, Nielsch K, Wehrspohn R B, Gösele U
Department of Physics, National University of Singapore, Singapore 117542, Republic of Singapore.
Phys Rev Lett. 2002 Jul 8;89(2):027201. doi: 10.1103/PhysRevLett.89.027201. Epub 2002 Jun 19.
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.
