Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substrates

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dc.contributor.authorFoerster, Michael
dc.contributor.authorRebled, J. M. (José Manuel)
dc.contributor.authorEstradé Albiol, Sònia
dc.contributor.authorSánchez Barrera, Florencio
dc.contributor.authorPeiró Martínez, Francisca
dc.contributor.authorFontcuberta i Griñó, Josep
dc.date.accessioned2012-10-11T11:44:15Z
dc.date.available2012-10-11T11:44:15Z
dc.date.issued2011
dc.date.updated2012-10-11T11:44:15Z
dc.description.abstractSpinel ferrites are being considered for advanced spintronic applications. Here, we report on the magnetic properties of ultrathin (3-37 nm) epitaxial films of NiFe2O4 (NFO) on MgAl2O4 (MAO) and SrTiO3 (STO) single crystalline substrates. It is found that NFO films on STO display superparamagnetic response down to 50 K, whereas films grown on MAO display ferrimagnetic response up to room temperature. Microstructural information indicates that this distinct response can be attributed to the different growth mechanisms of the spinel ferrite on the isostructural MAO substrate (two-dimensional growth) and the perovskite STO (Volmer-Weber three-dimensional growth). We discuss the reasons for this distinct behavior and its relevance for the integration of ferrites in epitaxial heterostructures for tunnel devices.
dc.format.extent7 p.
dc.format.mimetypeapplication/pdf
dc.identifier.idgrec601105
dc.identifier.issn1098-0121
dc.identifier.urihttps://hdl.handle.net/2445/32281
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.isformatofReproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevB.84.144422
dc.relation.ispartofPhysical Review B, 2011, num. 84, p. 144422-1-144422-7
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevB.84.144422
dc.rights(c) American Physical Society, 2011
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.sourceArticles publicats en revistes (Enginyeria Electrònica i Biomèdica)
dc.subject.classificationEspintrònica
dc.subject.classificationPropietats magnètiques
dc.subject.classificationPel·lícules fines
dc.subject.classificationPedres precioses
dc.subject.otherSpintronics
dc.subject.otherMagnetic properties
dc.subject.otherThin films
dc.subject.otherPrecious stones
dc.titleDistinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substrates
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion

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