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Effect of hole shape on spin-wave band structure in one-dimensional magnonic antidot waveguide

Effect of hole shape on spin-wave band structure in one-dimensional magnonic antidot waveguide
Effect of hole shape on spin-wave band structure in one-dimensional magnonic antidot waveguide
We present the possibility of tuning the spin-wave band structure, particularly the bandgaps in a nanoscale magnonic antidot waveguide by varying the shape of the antidots. The effects of changing the shape of the antidots on the spin-wave dispersion relation in a waveguide have been carefully monitored. We interpret the observed variations by analysing the equilibrium magnetic configuration and the magnonic power and phase distribution profiles during spin-wave dynamics. The inhomogeneity in the exchange fields at the antidot boundaries within the waveguide is found to play a crucial role in controlling the band structure at the discussed length scales. The observations recorded here will be important for future developments of magnetic antidot based magnonic crystals and waveguides.
band structure, dispersion relations, magnons, quantum dots, spin waves
0021-8979
23910
Kumar, D.
cce9f133-04b4-48b0-9174-fa6cfca3ce33
Sabareesan, P.
576ac5c3-9a23-44fb-8ecc-8340c15cd6da
Wang, W.
55ec185d-4220-4213-99ee-0819d50233f6
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Barman, A.
37f33704-c70d-43da-b803-0de7eb4107a4
Kumar, D.
cce9f133-04b4-48b0-9174-fa6cfca3ce33
Sabareesan, P.
576ac5c3-9a23-44fb-8ecc-8340c15cd6da
Wang, W.
55ec185d-4220-4213-99ee-0819d50233f6
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Barman, A.
37f33704-c70d-43da-b803-0de7eb4107a4

Kumar, D., Sabareesan, P., Wang, W., Fangohr, H. and Barman, A. (2013) Effect of hole shape on spin-wave band structure in one-dimensional magnonic antidot waveguide. Journal of Applied Physics, 114 (2), 23910. (doi:10.1063/1.4813228).

Record type: Article

Abstract

We present the possibility of tuning the spin-wave band structure, particularly the bandgaps in a nanoscale magnonic antidot waveguide by varying the shape of the antidots. The effects of changing the shape of the antidots on the spin-wave dispersion relation in a waveguide have been carefully monitored. We interpret the observed variations by analysing the equilibrium magnetic configuration and the magnonic power and phase distribution profiles during spin-wave dynamics. The inhomogeneity in the exchange fields at the antidot boundaries within the waveguide is found to play a crucial role in controlling the band structure at the discussed length scales. The observations recorded here will be important for future developments of magnetic antidot based magnonic crystals and waveguides.

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Published date: 12 July 2013
Keywords: band structure, dispersion relations, magnons, quantum dots, spin waves
Organisations: Computational Engineering & Design Group

Identifiers

Local EPrints ID: 354652
URI: https://eprints.soton.ac.uk/id/eprint/354652
ISSN: 0021-8979
PURE UUID: 87ec842d-a1a1-4082-affb-05873c5a6a7e

Catalogue record

Date deposited: 17 Jul 2013 14:32
Last modified: 18 Jul 2017 03:54

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