Show simple item record

dc.contributor.authorMcKeever, C
dc.contributor.authorOgrin, F
dc.contributor.authorAziz, M
dc.date.accessioned2018-10-18T08:25:34Z
dc.date.issued2018-07-10
dc.description.abstractThe dynamical properties of saturated spherical shells are investigated in the exchange-dominated regime when assuming that surface anisotropy is present at both the inner and outer boundaries. It is found that surface anisotropy plays an important role in determining the dependence of lower-order eigenvalues on shell thickness. The mode frequency can increase with decreasing shell thickness, or is driven rapidly towards the ferromagnetic resonance frequency depending on the choice of the surface anisotropy constant at each boundary. The presence of surface anisotropy significantly modifies the size dependence of the modes which can be suppressed or amplified based on the coupling between boundaries. When surface anisotropy is present only on the outer boundary, similar behaviour to the solid sphere is observed for lower-order eigenvalues up to a thickness of after which large deviations begin to occur, where and are the inner and outer radius, respectively. Moreover, surface anisotropy introduces a dependence of the zeroth mode on shell thickness, removing the degeneracy with the ferromagnetic resonance and leading to a pronounced size dependence of this mode for thin shells.en_GB
dc.description.sponsorshipThe authors acknowledge financial support from the Defense Science and Technology Laboratory (DSTL) and the Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom, via the EPSRC Centre for Doctoral Training in Electromagnetic Metamaterials (Grant No. EP/L015331/1).en_GB
dc.identifier.citationVol. 51, article 305003en_GB
dc.identifier.doi10.1088/1361-6463/aacd5b
dc.identifier.urihttp://hdl.handle.net/10871/34343
dc.language.isoenen_GB
dc.publisherIOP Publishingen_GB
dc.rights.embargoreasonUnder embargo until 10 July 2019 in compliance with publisher policyen_GB
dc.rights© 2018 IOP Publishing Ltden_GB
dc.subjectsurface anisotropyen_GB
dc.subjectexchange resonanceen_GB
dc.subjectnanoshellen_GB
dc.titleInfluence of surface anisotropy on exchange resonance modes in spherical shellsen_GB
dc.typeArticleen_GB
dc.identifier.issn0022-3727
dc.descriptionThis is the author accepted manuscript. The final version is available from IOP Publishing via the DOI in this recorden_GB
dc.identifier.journalJournal of Physics D: Applied Physicsen_GB


Files in this item

This item appears in the following Collection(s)

Show simple item record