High Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb-2@C79N with a Single-Electron Terbium-Terbium Bond

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dc.contributor.authorVelkos, Georgicsen
dc.contributor.authorKrylov, Denis S.en
dc.contributor.authorKirkpatrick, Kyleen
dc.contributor.authorSpree, Lukasen
dc.contributor.authorDubrovin, Vasiliien
dc.contributor.authorBuechner, Bernden
dc.contributor.authorAvdoshenko, Stanislav M.en
dc.contributor.authorBezmelnitsyn, Valeriyen
dc.contributor.authorDavis, Seanen
dc.contributor.authorFaust, Paulen
dc.contributor.authorDuchamp, Jamesen
dc.contributor.authorDorn, Harry C.en
dc.contributor.authorPopov, Alexey A.en
dc.contributor.departmentChemistryen
dc.date.accessioned2019-08-29T14:23:42Zen
dc.date.available2019-08-29T14:23:42Zen
dc.date.issued2019-04-23en
dc.description.abstractThe azafullerene Tb-2@C79N is found to be a single-molecule magnet with a high 100-s blocking temperature of magnetization of 24 K and large coercivity. Tb magnetic moments with an easy-axis single-ion magnetic anisotropy are strongly coupled by the unpaired spin of the single-electron Tb-Tb bond. Relaxation of magnetization in Tb-2@C79N below 15 K proceeds via quantum tunneling of magnetization with the characteristic time tau(QTM)=16462 +/- 1230 s. At higher temperature, relaxation follows the Orbach mechanism with a barrier of 757 +/- 4 K, corresponding to the excited states, in which one of the Tb spins is flipped.en
dc.description.notesWe acknowledge funding from the European Union's Horizon 2020 research and innovation programme, European Research Council (grant agreement No 648295 to A.A.P.), and Marie Sklodowska-Curie action (grant agreement No. 748635 to S.M.A.), and the Deutsche Forschungsgemeinschaft (grants PO 1602/4-1 and 1602/5-1 to A.A.P.). K.K. acknowledges financial support from a Luther & Alice Hamlett Scholarship. Computational resources were provided by the Center for High Performance Computing at the TU Dresden. We appreciate the help from Dr. Anja U. B. Wolter and Sebastian Gass in magnetic measurements and technical support with computational resources in IFW Dresden by Ulrike Nitzsche.en
dc.description.sponsorshipEuropean Union's Horizon 2020 research and innovation programme, European Research Council [648295]; European Union's Horizon 2020 research and innovation programme, Marie Sklodowska-Curie action [748635]; Deutsche Forschungsgemeinschaft [PO 1602/4-1, 1602/5-1]; Luther & Alice Hamlett Scholarshipen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1002/anie.201900943en
dc.identifier.eissn1521-3773en
dc.identifier.issn1433-7851en
dc.identifier.issue18en
dc.identifier.pmid30786125en
dc.identifier.urihttp://hdl.handle.net/10919/93298en
dc.identifier.volume58en
dc.language.isoenen
dc.rightsCreative Commons Attribution-NonCommercial 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/en
dc.subjectendohedral fullerenesen
dc.subjectexchange couplingen
dc.subjectmetal-metal bondsen
dc.subjectsingle-molecule magnetsen
dc.subjectterbiumen
dc.titleHigh Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb-2@C79N with a Single-Electron Terbium-Terbium Bonden
dc.title.serialAngewandte Chemie-International Editionen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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