Nanometer-thick YIG-based magnonic crystals: Bandgap dependence on groove depth, lattice constant, and film thickness

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorQin, Huajunen_US
dc.contributor.authorvan Dijken, Sebastiaanen_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorNanomagnetism and Spintronicsen
dc.date.accessioned2020-06-25T08:42:11Z
dc.date.available2020-06-25T08:42:11Z
dc.date.embargoinfo:eu-repo/date/embargoEnd/2021-05-20en_US
dc.date.issued2020-05-18en_US
dc.description.abstractWe report on bandgap tuning in magnonic crystals made of nanometer-thick yttrium iron garnet (YIG) films with CoFeB-filled grooves via a variation of the groove depth, lattice constant, and film thickness. Using broadband spin-wave spectroscopy, we demonstrate bandgap widening in a 260-nm-thick YIG crystal when the grooves are deepened from half to full film thickness. Importantly, low-loss spin-wave transmission in the allowed bands of the magnonic crystal is almost unaffected by the patterning of fully discrete YIG stripes. Downscaling of the YIG film thickness to 35nm decreases the bandgap size through a flattening of the spin-wave dispersion relation. We show that a reduction in the lattice constant effectively compensates for this trend. Our experimental results are corroborated by micromagnetic simulations, providing relevant information for the design of ultrathin YIG-based magnonic crystals with optimized bandgaps and spin-wave transmission properties.en
dc.description.versionPeer revieweden
dc.format.extent5
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationQin, H & van Dijken, S 2020, ' Nanometer-thick YIG-based magnonic crystals : Bandgap dependence on groove depth, lattice constant, and film thickness ', Applied Physics Letters, vol. 116, no. 20, 202403 . https://doi.org/10.1063/5.0009807en
dc.identifier.doi10.1063/5.0009807en_US
dc.identifier.issn0003-6951
dc.identifier.issn1077-3118
dc.identifier.otherPURE UUID: c097ea3d-91a5-47b3-a6dc-852359c29a23en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/c097ea3d-91a5-47b3-a6dc-852359c29a23en_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/43528889/Qin_Nanometer_thick.5.0009807.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/45207
dc.identifier.urnURN:NBN:fi:aalto-202006254164
dc.language.isoenen
dc.publisherAMER INST PHYSICS
dc.relation.ispartofseriesApplied Physics Lettersen
dc.relation.ispartofseriesVolume 116, issue 20en
dc.rightsopenAccessen
dc.titleNanometer-thick YIG-based magnonic crystals: Bandgap dependence on groove depth, lattice constant, and film thicknessen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
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