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dc.contributor.authorLeo, Naëmi
dc.contributor.authorHolenstein, Stefan
dc.contributor.authorSchildknecht, Dominik
dc.contributor.authorSendetskyi, Oles
dc.contributor.authorLuetkens, Hubertus
dc.contributor.authorDerlet, Peter M.
dc.contributor.authorScagnoli, Valerio
dc.contributor.authorLançon, Diane
dc.contributor.authorMardegan, José R. L.
dc.contributor.authorProkscha, Thomas
dc.contributor.authorSuter, Andreas
dc.contributor.authorSalman, Zaher
dc.contributor.authorLee, Stephen
dc.contributor.authorHeyderman, Laura J.
dc.date.accessioned2018-08-10T13:30:06Z
dc.date.available2018-08-10T13:30:06Z
dc.date.issued2018-07-20
dc.identifier.citationLeo , N , Holenstein , S , Schildknecht , D , Sendetskyi , O , Luetkens , H , Derlet , P M , Scagnoli , V , Lançon , D , Mardegan , J R L , Prokscha , T , Suter , A , Salman , Z , Lee , S & Heyderman , L J 2018 , ' Collective magnetism in an artificial 2D XY spin system ' , Nature Communications , vol. 9 , no. 1 , 2850 . https://doi.org/10.1038/s41467-018-05216-2en
dc.identifier.issn2041-1723
dc.identifier.otherPURE: 255251939
dc.identifier.otherPURE UUID: d2f3daf7-8a71-41e8-8ec7-f4ebc757952e
dc.identifier.otherRIS: urn:F570DF4CC8026769B2879E38EE51BC27
dc.identifier.otherRIS: Leo2018
dc.identifier.otherScopus: 85050593872
dc.identifier.otherORCID: /0000-0002-2020-3310/work/54995381
dc.identifier.otherWOS: 000439297100009
dc.identifier.urihttps://hdl.handle.net/10023/15800
dc.descriptionThis work was funded by the Swiss National Science Foundation (SNSF project grants 200021-155917, 200021-159736, and 200021-172774). D.L. acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No 701647. J.R.L.M. is grateful to the Swiss National Center of Competence in Research, Molecular Ultrafast Science and Technology (NCCR MUST).en
dc.description.abstractTwo-dimensional magnetic systems with continuous spin degrees of freedom exhibit a rich spectrum of thermal behaviour due to the strong competition between fluctuations and correlations. When such systems incorporate coupling via the anisotropic dipolar interaction, a discrete symmetry emerges, which can be spontaneously broken leading to a low-temperature ordered phase. However, the experimental realisation of such two-dimensional spin systems in crystalline materials is difficult since the dipolar coupling is usually much weaker than the exchange interaction. Here we realise two-dimensional magnetostatically coupled XY spin systems with nanoscale thermally active magnetic discs placed on square lattices. Using low-energy muon-spin relaxation and soft X-ray scattering, we observe correlated dynamics at the critical temperature and the emergence of static long-range order at low temperatures, which is compatible with theoretical predictions for dipolar-coupled XY spin systems. Furthermore, by modifying the sample design, we demonstrate the possibility to tune the collective magnetic behaviour in thermally active artificial spin systems with continuous degrees of freedom.
dc.format.extent8
dc.language.isoeng
dc.relation.ispartofNature Communicationsen
dc.rights© The Author(s) 2018. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.en
dc.subjectQC Physicsen
dc.subjectDASen
dc.subject.lccQCen
dc.titleCollective magnetism in an artificial 2D XY spin systemen
dc.typeJournal articleen
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/10.1038/s41467-018-05216-2
dc.description.statusPeer revieweden
dc.identifier.grantnumberEP/E064264/1en
dc.identifier.grantnumberEP/J01060X/1en
dc.identifier.grantnumberEP/R031924/1en


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