Topographic anisotropy in continuous magnetic films with two-dimensional surface nanomodulation

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dc.contributor.authorLi, S. P.
dc.contributor.authorGodsell, Jeffrey F.
dc.contributor.authorRoy, Saibal
dc.contributor.funderScience Foundation Ireland
dc.date.accessioned2017-09-20T10:06:35Z
dc.date.available2017-09-20T10:06:35Z
dc.date.issued2010
dc.description.abstractArtificial and local control of spin-configuration in nanoscale in continuous magnetic films could enable new spin-based electronics and precision sensor technologies. Extensive theoretical research has recently been devoted to examination of surface nanovariation mediated magnetism and its utility, which has been demonstrated only in one-dimensional surface modulation. However, a realization of engineered spin configuration using two-dimensional (2D) nanomodulation is limited by local vortex formation induced by magnetostatic energy. In this work we demonstrate for the first time, an ability to control the anisotropy in continuous magnetic films by periodic surface nanomodulation in two-dimensions (2D). Magnetic properties of NiFe films with nanomodulated surfaces have been studied as a function of both film thickness and modulation amplitude. For films with a patterned square array (without breaking the film continuity), a clear fourfold symmetry of anisotropy field and coercivity was observed with rotation angle. An experimental phase diagram of anisotropy with respect to film thickness and modulation amplitude has been produced which delineates that the observed fourfold anisotropy is induced by the magnetostatic effect. The observed dependence of anisotropy field on film thickness and surface modulation amplitude agrees well with the developed theory. (C) 2010 American Institute of Physics. [doi:10.1063/1.3501111]en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid93915
dc.identifier.citationLi, S. P., Godsell, J. F. and Roy, S. (2010) 'Topographic anisotropy in continuous magnetic films with two-dimensional surface nanomodulation', Journal of Applied Physics, 108(9), 093915 (5pp). doi: 10.1063/1.3501111en
dc.identifier.doi10.1063/1.3501111
dc.identifier.endpage5
dc.identifier.issn0021-8979
dc.identifier.issued9
dc.identifier.journaltitleJournal of Applied Physicsen
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/10468/4743
dc.identifier.volume108
dc.language.isoenen
dc.publisherAIP Publishingen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Principal Investigator Programme (PI)/06/IN.1/I98/IE/Development of novel nano-composite high-frequency magnetic materials for future microprocessor power delivery/
dc.relation.urihttp://aip.scitation.org/doi/10.1063/1.3501111
dc.rights© 2010, American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Li, S. P., Godsell, J. F. and Roy, S. (2010) 'Topographic anisotropy in continuous magnetic films with two-dimensional surface nanomodulation', Journal of Applied Physics, 108(9), 093915 (5pp). doi: 10.1063/1.3501111 and may be found at http://aip.scitation.org/doi/10.1063/1.3501111en
dc.subjectMagnetic filmsen
dc.subjectMagnetic anisotropyen
dc.subjectAnisotropyen
dc.subjectCoercive forceen
dc.subjectThin film structureen
dc.titleTopographic anisotropy in continuous magnetic films with two-dimensional surface nanomodulationen
dc.typeArticle (peer-reviewed)en
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