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

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RECERCAT Home > Universitat de Barcelona > Enginyeria Electrònica i Biomèdica > Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) > View document

To access the full text documents, please follow this link: http://hdl.handle.net/2445/32281

dc.contributor	Universitat de Barcelona
dc.contributor.author	Foerster, Michael
dc.contributor.author	Rebled, J. M. (José Manuel)
dc.contributor.author	Estradé Albiol, Sònia
dc.contributor.author	Sánchez Barrera, Florencio
dc.contributor.author	Peiró Martínez, Francisca
dc.contributor.author	Fontcuberta i Griñó, Josep
dc.date	2012-10-11T11:44:15Z
dc.date	2012-10-11T11:44:15Z
dc.date	2011
dc.date	2012-10-11T11:44:15Z
dc.identifier.citation	1098-0121
dc.identifier.citation	601105
dc.identifier.uri	http://hdl.handle.net/2445/32281
dc.format	7 p.
dc.format	application/pdf
dc.language.iso	eng
dc.publisher	American Physical Society
dc.relation	Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevB.84.144422
dc.relation	Physical Review B, 2011, num. 84, p. 144422-1-144422-7
dc.relation	http://dx.doi.org/10.1103/PhysRevB.84.144422
dc.rights	(c) American Physical Society, 2011
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Espintrònica
dc.subject	Propietats magnètiques
dc.subject	Pel·lícules fines
dc.subject	Pedres precioses
dc.subject	Spintronics
dc.subject	Magnetic properties
dc.subject	Thin films
dc.subject	Precious stones
dc.title	Distinct magnetism in ultrathin epitaxial NiFe2O4 ﬁlms on MgAl2O4 and SrTiO3single crystalline substrates
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion
dc.description.abstract	Spinel 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.

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