Spin-wave spectrum of a magnonic crystal with an isolated defect

V. V. Kruglyak, M. L. Sokolovskii, V. S. Tkachenko, A. N. Kuchko
2006 Journal of Applied Physics  
Real magnonic crystals - periodic magnetic media for spin wave (magnon) propagation - may contain some defects. We report theoretical spin wave spectra of a one dimensional magnonic crystal with an isolated defect. The latter is modeled by insertion of an additional layer with thickness and magnetic anisotropy values different from those of the magnonic crystal constituent layers. The defect layer leads to appearance of several localized defect modes within the magnonic band gaps. The frequency
more » ... gaps. The frequency and the number of the defect modes may be controlled by varying parameters of the constituent layers of the magnonic crystal.
doi:10.1063/1.2164419 fatcat:yrvt6wnylvfx3maglelsbwkbom