Spin Waves in a Periodically Layered Magnetic Nanowire
arXiv:cond-mat/0505382 · doi:10.1063/1.1935764
Abstract
We report a simple theoretical derivation of the spectrum and damping of spin waves in a cylindrical periodically structured magnetic nanowire (cylindrical magnonic crystal) in the "effective medium" approximation. The dependence of the "effective" magnetic parameters upon the individual layer parameters is shown to be different from the arithmetic average over the volume of the superlattice. The formulae that are obtained can be applied firstly in the description of spin wave dispersion in the first allowed band of the structure; and secondly in the design of a magnonic crystal with band-gaps in an arbitrary part of the spin wave spectrum.
15 pages, 3 figures; submitted to Journal of Applied Physics
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- Effect of Hole Shape on Spin-Wave Band Structure in One-Dimensional Magnonic Antidot Waveguide
- Spin wave modes in a cylindrical nanowire in crossover dipolar-exchange regime