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Title: Nanostructured magnonic crystal with magnetic-field tunable bandgap
Authors: Zhang, V.L. 
Wang, Z.K. 
Lim, H.S. 
Ng, S.C. 
Kuok, M.H. 
Jain, S. 
Adeyeye, A.O. 
Keywords: Brillouin light scattering
Magnonic crystal
Tunable bandgap
Issue Date: Mar-2011
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.
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
ISSN: 15334880
DOI: 10.1166/jnn.2011.2730
Appears in Collections:Staff Publications

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