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Observation of anomalous Meissner screening in Cu/Nb and Cu/Nb/Co thin films

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dc.contributor.authorFlokstra, M. G.
dc.contributor.authorStewart, R.
dc.contributor.authorSatchell, N.
dc.contributor.authorBurnell, G.
dc.contributor.authorLuetkens, H.
dc.contributor.authorProkscha, T.
dc.contributor.authorSuter, A.
dc.contributor.authorMorenzoni, E.
dc.contributor.authorLangridge, S.
dc.contributor.authorLee, S. L.
dc.date.accessioned2018-08-20T11:30:05Z
dc.date.available2018-08-20T11:30:05Z
dc.date.issued2018-06-14
dc.identifier.citationFlokstra , M G , Stewart , R , Satchell , N , Burnell , G , Luetkens , H , Prokscha , T , Suter , A , Morenzoni , E , Langridge , S & Lee , S L 2018 , ' Observation of anomalous Meissner screening in Cu/Nb and Cu/Nb/Co thin films ' , Physical Review Letters , vol. 120 , no. 24 , 247001 . https://doi.org/10.1103/PhysRevLett.120.247001en
dc.identifier.issn0031-9007
dc.identifier.otherPURE: 253462892
dc.identifier.otherPURE UUID: ec78099c-4dbb-4a98-85b2-ded5d011c9e3
dc.identifier.otherScopus: 85048602722
dc.identifier.otherORCID: /0000-0002-2020-3310/work/54995378
dc.identifier.otherORCID: /0000-0002-4333-1358/work/59953706
dc.identifier.otherWOS: 000435336200010
dc.identifier.urihttps://hdl.handle.net/10023/15845
dc.descriptionWe acknowledge the support of the Engineering and Physical Sciences Research Council through Grants No. EP/I031014/1, No. EP/J01060X/1, No. EP/J010634/1, No. EP/J010650/1, and No. EP/L015110/1.en
dc.description.abstractWe have observed the spatial distribution of magnetic flux in Nb, Cu/Nb, and Cu/Nb/Co thin films using muon-spin rotation. In an isolated 50-nm-thick Nb film, we find a weak flux expulsion (Meissner effect) which becomes significantly enhanced when adding an adjacent 40 nm layer of Cu. The added Cu layer exhibits a Meissner effect (due to induced superconducting pairs) and is at least as effective as the Nb to expel flux. These results are confirmed by theoretical calculations using the quasiclassical Green's function formalism. An unexpected further significant enhancement of the flux expulsion is observed when adding a thin (2.4 nm) ferromagnetic Co layer to the bottom side of the Nb. This observed cooperation between superconductivity and ferromagnetism, by an unknown mechanism, forms a key ingredient for developing superconducting spintronics.
dc.format.extent5
dc.language.isoeng
dc.relation.ispartofPhysical Review Lettersen
dc.rights© 2018, American Physical Society. This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.1103/PhysRevLett.120.247001en
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subject.lccQCen
dc.titleObservation of anomalous Meissner screening in Cu/Nb and Cu/Nb/Co thin filmsen
dc.typeJournal articleen
dc.contributor.sponsorEPSRCen
dc.contributor.sponsorEPSRCen
dc.contributor.sponsorEPSRCen
dc.contributor.sponsorEPSRCen
dc.contributor.sponsorEPSRCen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.identifier.doihttps://doi.org/10.1103/PhysRevLett.120.247001
dc.description.statusPeer revieweden
dc.identifier.urlhttp://eprints.whiterose.ac.uk/130938/en
dc.identifier.grantnumberEP/R031924/1en
dc.identifier.grantnumberEP/I031014/1en
dc.identifier.grantnumberEP/J01060X/1en
dc.identifier.grantnumberEP/L015110/1en
dc.identifier.grantnumberEP/L015110/1en


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