Abstract
This chapter is focusing on the dynamic properties of nanowires. It is shown how the properties of nanowires change from a single nanowire (or a large ensemble of noninteracting nanowires) to a strongly interacting nanowire system. The dominating role of the long-range magnetostatic dipolar interactions is demonstrated in establishing a configurational reorientation transition. The interaction of magnetic nanowires with electromagnetic waves (EMW) leads to a specific spin-wave excitation spectrum due to its size and shape sensitivity. The results of modeling the electrodynamic diffraction problem show how the properties of these flexible systems of ordered magnetic nanowires can be controlled and tuned up to the terahertz frequency range. Magnetic nanowire systems are serious contenders for novel microwave devices, based on the propagation of EMW in the nanostructures, and they are already applied in microwave devices, photonics, and plasmonics.
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