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

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 r...

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Detalhes bibliográficos
Autores: Foerster, Michael, Rebled, J. M. (José Manuel), Estradé Albiol, Sònia, Sánchez Barrera, Florencio, Peiró Martínez, Francisca, Fontcuberta i Griñó, Josep
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/32281
Acesso em linha:https://hdl.handle.net/2445/32281
Access Level:acceso abierto
Palavra-chave:Espintrònica
Propietats magnètiques
Pel·lícules fines
Pedres precioses
Spintronics
Magnetic properties
Thin films
Precious stones
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spelling Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substratesFoerster, MichaelRebled, J. M. (José Manuel)Estradé Albiol, SòniaSánchez Barrera, FlorencioPeiró Martínez, FranciscaFontcuberta i Griñó, JosepEspintrònicaPropietats magnètiquesPel·lícules finesPedres preciosesSpintronicsMagnetic propertiesThin filmsPrecious stonesSpinel 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.American Physical Society2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/32281Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevB.84.144422Physical Review B, 2011, num. 84, p. 144422-1-144422-7http://dx.doi.org/10.1103/PhysRevB.84.144422(c) American Physical Society, 2011info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/322812026-05-27T06:46:51Z
dc.title.none.fl_str_mv Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substrates
title Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substrates
spellingShingle Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substrates
Foerster, Michael
Espintrònica
Propietats magnètiques
Pel·lícules fines
Pedres precioses
Spintronics
Magnetic properties
Thin films
Precious stones
title_short Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substrates
title_full Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substrates
title_fullStr Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substrates
title_full_unstemmed Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substrates
title_sort Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3single crystalline substrates
dc.creator.none.fl_str_mv Foerster, Michael
Rebled, J. M. (José Manuel)
Estradé Albiol, Sònia
Sánchez Barrera, Florencio
Peiró Martínez, Francisca
Fontcuberta i Griñó, Josep
author Foerster, Michael
author_facet Foerster, Michael
Rebled, J. M. (José Manuel)
Estradé Albiol, Sònia
Sánchez Barrera, Florencio
Peiró Martínez, Francisca
Fontcuberta i Griñó, Josep
author_role author
author2 Rebled, J. M. (José Manuel)
Estradé Albiol, Sònia
Sánchez Barrera, Florencio
Peiró Martínez, Francisca
Fontcuberta i Griñó, Josep
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Espintrònica
Propietats magnètiques
Pel·lícules fines
Pedres precioses
Spintronics
Magnetic properties
Thin films
Precious stones
topic Espintrònica
Propietats magnètiques
Pel·lícules fines
Pedres precioses
Spintronics
Magnetic properties
Thin films
Precious stones
description 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.
publishDate 2011
dc.date.none.fl_str_mv 2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/32281
url https://hdl.handle.net/2445/32281
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevB.84.144422
Physical Review B, 2011, num. 84, p. 144422-1-144422-7
http://dx.doi.org/10.1103/PhysRevB.84.144422
dc.rights.none.fl_str_mv (c) American Physical Society, 2011
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2011
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.198674

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