Nanostructured magnonic crystals with size-tunable bandgaps

ACS Nano
Z K WangAdekunle Olusola Adeyeye

Abstract

Just as a photonic crystal is a periodic composite composed of materials with different dielectric constants, its lesser known magnetic analogue, the magnonic crystal can be considered as a periodic composite comprising different magnetic materials. Magnonic crystals are excellent candidates for the fabrication of nanoscale microwave devices, as the wavelengths of magnons in magnonic crystals are orders of magnitude shorter than those of photons, of the same frequency, in photonic crystals. Using advanced electron beam lithographic techniques, we have fabricated a series of novel bicomponent magnonic crystals which exhibit well-defined frequency bandgaps. They are in the form of laterally patterned periodic arrays of alternating cobalt and permalloy stripes of various widths ranging from 150 to 500 nm. Investigations by Brillouin light scattering and computer modeling show that the dispersion spectrum of these crystals is strongly dependent on their structural dimensions. For instance, their first frequency bandgap is found to vary over a wide range of 1.4-2.6 gigahertz. Such a functionality permits the tailoring of the bandgap structure which controls the transmission of information-carrying spin waves in devices based on thes...Continue Reading

References

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Nov 20, 2001·Nature·Y A VlasovD J Norris
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Citations

Jun 28, 2016·ACS Applied Materials & Interfaces·Samiran ChoudhuryAnjan Barman
Mar 7, 2014·Journal of Physics. Condensed Matter : an Institute of Physics Journal·M Krawczyk, D Grundler
Dec 23, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·S TacchiG Carlotti
Jul 7, 2018·Beilstein Journal of Nanotechnology·Silvia RizzatoGiuseppe Maruccio
Apr 15, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Pd Dr Khalil Zakeri Lori
Dec 24, 2018·Nature Communications·Huajun QinSebastiaan van Dijken
Dec 17, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·G DuerrD Grundler
Aug 28, 2019·Advanced Science·Igor A GolovchanskiyAlexey V Ustinov
Jun 22, 2021·ACS Applied Materials & Interfaces·Nabil ChallabFatih Zighem
Mar 5, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Anjan BarmanM Winklhofer

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