Ferromagnetism in transparent thin films of MgO

We show both theoretical and experimental evidences of the appearance of ferromagnetism in MgO thin films. First-principles calculations allow predicting the possibility of the formation of a local moment in MgO, provided the existence of Mg vacancies which create holes on acceptor levels near the O...

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Autores: Martínez Boubeta, José Carlos, Beltrán, J. I., Balcells i Argemí, Lluís, Konstantinović, Zorica, Valencia, S., Schmitz, D., Arbiol i Cobos, Jordi, Estradé Albiol, Sònia, Cornil, J., Martínez Perea, Benjamin
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2010
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/33086
Acceso en línea:https://hdl.handle.net/2445/33086
Access Level:acceso abierto
Palabra clave:Pel·lícules fines
Ferromagnetisme
Òxid de magnesi
Espintrònica
Thin films
Ferromagnetism
Magnesium oxide
Spintronics
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repository_id_str
spelling Ferromagnetism in transparent thin films of MgOMartínez Boubeta, José CarlosBeltrán, J. I.Balcells i Argemí, LluísKonstantinović, ZoricaValencia, S.Schmitz, D.Arbiol i Cobos, JordiEstradé Albiol, SòniaCornil, J.Martínez Perea, BenjaminPel·lícules finesFerromagnetismeÒxid de magnesiEspintrònicaThin filmsFerromagnetismMagnesium oxideSpintronicsWe show both theoretical and experimental evidences of the appearance of ferromagnetism in MgO thin films. First-principles calculations allow predicting the possibility of the formation of a local moment in MgO, provided the existence of Mg vacancies which create holes on acceptor levels near the O 2p-dominated valence band. Magnetic measurements evidence of the existence of room-temperature ferromagnetism in MgO thin films. High-resolution transmission electron microscopy demonstrates the existence of cation vacancies in our samples. Finally, by applying the element specificity of the x-ray magnetic circular dichroism technique, we also demonstrate that the magnetic moments of the system arise from the spin polarization of the 2p electrons of oxygen atoms surrounding Mg vacancies.American Physical Society2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/33086Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésPhysical Review B, 2010, vol. 82, p. 024405-1-024405-7(c) American Physical Society, 2010info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/330862026-05-27T06:46:51Z
dc.title.none.fl_str_mv Ferromagnetism in transparent thin films of MgO
title Ferromagnetism in transparent thin films of MgO
spellingShingle Ferromagnetism in transparent thin films of MgO
Martínez Boubeta, José Carlos
Pel·lícules fines
Ferromagnetisme
Òxid de magnesi
Espintrònica
Thin films
Ferromagnetism
Magnesium oxide
Spintronics
title_short Ferromagnetism in transparent thin films of MgO
title_full Ferromagnetism in transparent thin films of MgO
title_fullStr Ferromagnetism in transparent thin films of MgO
title_full_unstemmed Ferromagnetism in transparent thin films of MgO
title_sort Ferromagnetism in transparent thin films of MgO
dc.creator.none.fl_str_mv Martínez Boubeta, José Carlos
Beltrán, J. I.
Balcells i Argemí, Lluís
Konstantinović, Zorica
Valencia, S.
Schmitz, D.
Arbiol i Cobos, Jordi
Estradé Albiol, Sònia
Cornil, J.
Martínez Perea, Benjamin
author Martínez Boubeta, José Carlos
author_facet Martínez Boubeta, José Carlos
Beltrán, J. I.
Balcells i Argemí, Lluís
Konstantinović, Zorica
Valencia, S.
Schmitz, D.
Arbiol i Cobos, Jordi
Estradé Albiol, Sònia
Cornil, J.
Martínez Perea, Benjamin
author_role author
author2 Beltrán, J. I.
Balcells i Argemí, Lluís
Konstantinović, Zorica
Valencia, S.
Schmitz, D.
Arbiol i Cobos, Jordi
Estradé Albiol, Sònia
Cornil, J.
Martínez Perea, Benjamin
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Pel·lícules fines
Ferromagnetisme
Òxid de magnesi
Espintrònica
Thin films
Ferromagnetism
Magnesium oxide
Spintronics
topic Pel·lícules fines
Ferromagnetisme
Òxid de magnesi
Espintrònica
Thin films
Ferromagnetism
Magnesium oxide
Spintronics
description We show both theoretical and experimental evidences of the appearance of ferromagnetism in MgO thin films. First-principles calculations allow predicting the possibility of the formation of a local moment in MgO, provided the existence of Mg vacancies which create holes on acceptor levels near the O 2p-dominated valence band. Magnetic measurements evidence of the existence of room-temperature ferromagnetism in MgO thin films. High-resolution transmission electron microscopy demonstrates the existence of cation vacancies in our samples. Finally, by applying the element specificity of the x-ray magnetic circular dichroism technique, we also demonstrate that the magnetic moments of the system arise from the spin polarization of the 2p electrons of oxygen atoms surrounding Mg vacancies.
publishDate 2010
dc.date.none.fl_str_mv 2010
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/2445/33086
url https://hdl.handle.net/2445/33086
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Physical Review B, 2010, vol. 82, p. 024405-1-024405-7
dc.rights.none.fl_str_mv (c) American Physical Society, 2010
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2010
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 15,300724

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