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|Title:||Phononic and magnonic dispersions of surface waves on a permalloy/BARC nanostructured array||Authors:||Pan, H.
Brillouin light scattering
Phononic and magnonic dispersions
|Issue Date:||2013||Citation:||Pan, H., Zhang, V.L., Di, K., Kuok, M.H., Lim, H.S., Ng, S.C., Singh, N., Adeyeye, A.O. (2013). Phononic and magnonic dispersions of surface waves on a permalloy/BARC nanostructured array. Nanoscale Research Letters 8 (1) : 1-6. ScholarBank@NUS Repository. https://doi.org/10.1186/1556-276X-8-115||Abstract:||Phononic and magnonic dispersions of a linear array of periodic alternating Ni80Fe20and bottom anti-reflective coating nanostripes on a Si substrate have been measured using Brillouin light scattering. The observed phononic gaps are considerably larger than those of laterally patterned multi-component crystals previously reported, mainly a consequence of the high elastic and density contrasts between the stripe materials. Additionally, the phonon hybridization bandgap has an unusual origin in the hybridization and avoided crossing of the zone-folded Rayleigh and pseudo-Sezawa waves. The magnonic band structure features near-dispersionless branches, with unusual vortex-like dynamic magnetization profiles, some of which lie below the highly-dispersive fundamental mode branch. Finite element calculations of the phononic and magnonic dispersions of the magphonic crystal accord well with experimental data. © 2013 Pan et al.; licensee Springer.||Source Title:||Nanoscale Research Letters||URI:||http://scholarbank.nus.edu.sg/handle/10635/82891||ISSN:||19317573||DOI:||10.1186/1556-276X-8-115|
|Appears in Collections:||Staff Publications|
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