Band structure of magnonic crystals with defects: Brillouin spectroscopy and micromagnetic simulations
arXiv:1406.4981 · doi:10.1103/PhysRevB.90.060405
Abstract
Using Brillouin spectroscopy, the first observation has been made of the band structures of nanostructured defect magnonic crystals. The samples are otherwise one-dimensional periodic arrays of equal-width Ni80Fe20 and cobalt nanostripes, where the defects are stripes of a different width. A dispersionless defect branch emerges within the bandgap with a frequency tunable by varying the defect stripe width, while the other branches observed are similar to those of a defect-free crystal. Micromagnetic and finite-element simulations performed unveil additional tiny bandgaps and the frequency-dependent localization of the defect mode in the vicinity of the defects.
arXiv comment5 pages, 5 figures
References in corpus (4)
- Controlling the Spontaneous Emission Rate of Single Quantum Dots in a 2D Photonic Crystal
- Scattering of surface and volume spin waves in a magnonic crystal
- Experimental demonstration of the slow group velocity of light in two-dimensional coupled photonic crystal microcavity arrays
- Spin wave spectrum of a magnonic crystal with an isolated defect
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- Symmetry and localization properties of defect modes in magnonic superlattices
- Magnetization reversal using excitation of collective modes in nanodot matrices