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dc.contributor.authorCOEY, JOHNen
dc.contributor.authorSHVETS, IGORen
dc.date.accessioned2010-07-15T08:46:14Z
dc.date.available2010-07-15T08:46:14Z
dc.date.issued1993en
dc.date.submitted1993en
dc.identifier.citationJ M D Coey and I V Shvets, R Wiesendanger and H-J Güntherodt, Charge freezing and surface anisotropy on magnetite (100), Journal of Applied Physics, 73, 10, 1993, 6742 - 6744en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/40332
dc.descriptionPUBLISHEDen
dc.description.abstractScanning tunneling microscope images of the (100) surface of slightly nonstoichiometric magnetite taken at room temperature show static arrays of pairs of Fe2+ ions with short?range order, and a charge fluctuation time greater than 103 s. The surface appears to be a Wigner glass with electron pairs localized on adjacent ions as the basic unit. The explanation of Wigner localization at room temperature on the surface only is that the spin?polarized minority?spin band derived from dyz orbitals is stabilized and narrowed by the absence of an apicial oxygen from the B?site octahedron. This leads to surface anisotropy where the Fe2+ spins are pinned normal to the {100} surfaces. Surface anisotropy is expected to outweigh bulk anisotropy in submicron particles.en
dc.description.sponsorshipFinancial support of the Irish Science and Technology Agency EOLAS and the Swiss National Science Foundation is gratefully acknowledged.en
dc.format.extent6742en
dc.format.extent6744en
dc.language.isoenen
dc.relation.ispartofseriesJournal of Applied Physicsen
dc.relation.ispartofseries73en
dc.relation.ispartofseries10en
dc.rightsYen
dc.subjectAtomic, molecular and chemical physicsen
dc.subjectScanning tunneling microscopeen
dc.subjectSurface magnetismen
dc.titleCharge freezing and surface anisotropy on magnetite (100)en
dc.typeJournal Articleen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/jcoeyen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/ivchvetsen
dc.identifier.rssinternalid3841en
dc.identifier.rssurihttp://dx.doi.org/10.1063/1.352522en
dc.contributor.sponsorScience Foundation Ireland (SFI)en


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