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dc.creatorDi Giorgio, C
dc.creatorBobba, F
dc.creatorCucolo, AM
dc.creatorScarfato, A
dc.creatorMoore, SA
dc.creatorKarapetrov, G
dc.creatorD'Agostino, D
dc.creatorNovosad, V
dc.creatorYefremenko, V
dc.creatorIavarone, M
dc.date.accessioned2021-01-25T21:29:47Z
dc.date.available2021-01-25T21:29:47Z
dc.date.issued2016-12-09
dc.identifier.issn2045-2322
dc.identifier.issn2045-2322
dc.identifier.doihttp://dx.doi.org/10.34944/dspace/4969
dc.identifier.otherEE3ZK (isidoc)
dc.identifier.other27934898 (pubmed)
dc.identifier.urihttp://hdl.handle.net/20.500.12613/4987
dc.description.abstract© 2016 The Author(s). While Abrikosov vortices repel each other and form a uniform vortex lattice in bulk type-II superconductors, strong confinement potential profoundly affects their spatial distribution eventually leading to vortex cluster formation. The confinement could be induced by the geometric boundaries in mesoscopic-size superconductors or by the spatial modulation of the magnetic field in superconductor/ferromagnet (S/F) hybrids. Here we study the vortex confinement in S/F thin film heterostructures and we observe that vortex clusters appear near magnetization inhomogeneities in the ferromagnet, called bifurcations. We use magnetic force microscopy to image magnetic bifurcations and superconducting vortices, while high resolution scanning tunneling microscopy is used to obtain detailed information of the local electronic density of states outside and inside the vortex cluster. We find an intervortex spacing at the bifurcation shorter than the one predicted for the same superconductor in a uniform magnetic field equal to the thermodynamical upper critical field H c2. This result is due to a local enhanced stray field and a competition between vortex-vortex repulsion and Lorentz force. Our findings suggest that special magnetic topologies could result in S/F hybrids that support superconductivity even when locally the vortex density exceeds the thermodynamic critical threshold value beyond which the superconductivity is destroyed.
dc.format.extent38557-
dc.language.isoen
dc.relation.haspartScientific Reports
dc.relation.isreferencedbySpringer Science and Business Media LLC
dc.rightsCC BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject0912 Materials Engineering
dc.titleObservation of superconducting vortex clusters in S/F hybrids
dc.typeArticle
dc.type.genreJournal Article
dc.relation.doi10.1038/srep38557
dc.ada.noteFor Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
dc.date.updated2021-01-25T21:29:43Z
refterms.dateFOA2021-01-25T21:29:47Z


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