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|Title:||Nanostructured magnonic crystal with magnetic-field tunable bandgap|
|Authors:||Zhang, V.L. |
|Keywords:||Brillouin light scattering|
|Citation:||Zhang, V.L., Wang, Z.K., Lim, H.S., Ng, S.C., Kuok, M.H., Jain, S., Adeyeye, A.O. (2011-03). Nanostructured magnonic crystal with magnetic-field tunable bandgap. Journal of Nanoscience and Nanotechnology 11 (3) : 2657-2660. ScholarBank@NUS Repository. https://doi.org/10.1166/jnn.2011.2730|
|Abstract:||Most experimental investigations into magnonic bandgaps are based on structures composed of single-constituent magnetic materials. Here we report Brillouin and numerical studies of the spin dynamics of a bi-component magnonic crystal, viz. a one-dimensional periodic array of alternating permalloy and cobalt 150 nm-wide nanostripes. Our maesurements, together with those for a similar crystal composed of 250 nm-wide nanosetripes, suggest that for a stripe width ratio of 1:1, the bandgap width of such magnonic arrays increases with crystal lattice constant. The bandgap parameters are strongly dependent on external magnetic field. This magnetic-field tunability of the bandgap is expected to be a crucial property of devices based on magnonic crystals. The agreement between numerical calculations, based on finite element analysis, and the experimental data is generally good. © 2011 American Scientific Publishers.|
|Source Title:||Journal of Nanoscience and Nanotechnology|
|Appears in Collections:||Staff Publications|
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