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Title: Phononic and magnonic dispersions of surface waves on a permalloy/BARC nanostructured array
Authors: Pan, H. 
Zhang, V.L. 
Di, K.
Kuok, M.H. 
Lim, H.S. 
Ng, S.C. 
Singh, N.
Adeyeye, A.O. 
Keywords: Bandgaps
Brillouin light scattering
Magphonic crystal
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.
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
ISSN: 19317573
DOI: 10.1186/1556-276X-8-115
Appears in Collections:Staff Publications

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