Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches

Fe/MgO-based magnetic tunnel junctions are among the most promising candidates for spintronic devices due to their high thermal stability and high tunneling magnetoresistance. Despite its apparent simplicity, the nature of the interactions between the Fe and MgO layers leads to complex finite-size e...

Descripción completa

Detalles Bibliográficos
Autores: Quadrado del Burgo, Ramón|||0000-0002-8344-2319, Oroszlány, László, Deák, András, Ostler, Thomas A., Meo, Andrea, Chepulskii, Roman V., Apalkov, Dmytro, Evans, Richard F. L., Szunyogh, László, Chantrell, Roy W.|||0000-0001-5410-5615
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:216216
Acceso en línea:https://ddd.uab.cat/record/216216
https://dx.doi.org/urn:doi:10.1103/PhysRevApplied.9.054048
Access Level:acceso abierto
Palabra clave:Effective magnetic anisotropy
Ferromagnetic and anti-ferromagnetic
First-principles calculation
Interfacial magnetic anisotropies
Magnetic anisotropy energy
Magnetic tunnel junction
Spin reorientation transitions
Tunneling magnetoresistance
id ES_94953a305ef9d4e1ee596d223147fd64
oai_identifier_str oai:ddd.uab.cat:216216
network_acronym_str ES
network_name_str España
repository_id_str
spelling Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO SandwichesQuadrado del Burgo, Ramón|||0000-0002-8344-2319Oroszlány, LászlóDeák, AndrásOstler, Thomas A.Meo, AndreaChepulskii, Roman V.Apalkov, DmytroEvans, Richard F. L.Szunyogh, LászlóChantrell, Roy W.|||0000-0001-5410-5615Effective magnetic anisotropyFerromagnetic and anti-ferromagneticFirst-principles calculationInterfacial magnetic anisotropiesMagnetic anisotropy energyMagnetic tunnel junctionSpin reorientation transitionsTunneling magnetoresistanceFe/MgO-based magnetic tunnel junctions are among the most promising candidates for spintronic devices due to their high thermal stability and high tunneling magnetoresistance. Despite its apparent simplicity, the nature of the interactions between the Fe and MgO layers leads to complex finite-size effects and temperature-dependent magnetic properties which must be carefully controlled for practical applications. In this article, we investigate the electronic, structural, and magnetic properties of MgO/Fe/MgO sandwiches using first-principles calculations and atomistic spin modeling based on a fully parametrized spin Hamiltonian. We find a large contribution to the effective interfacial magnetic anisotropy from the two-ion exchange energy. Minimization of the total energy using atomistic simulations shows a surprising spin-spiral ground-state structure at the interface owing to frustrated ferromagnetic and antiferromagnetic interactions, leading to a reduced Curie temperature and strong layerwise temperature dependence of the magnetization. The different temperature dependences of the interface and bulklike layers results in an unexpected nonmonotonic temperature variation of the effective magnetic-anisotropy energy and temperature-induced spin-reorientation transition to an in-plane magnetization at low temperatures. Our results demonstrate the intrinsic physical complexity of the pure Fe/MgO interface and the role of elevated temperatures providing insight when interpreting experimental data of nanoscale magnetic tunnel junctions. 22018-01-0120182018-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/216216https://dx.doi.org/urn:doi:10.1103/PhysRevApplied.9.054048reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengEuropean Commission https://doi.org/10.13039/501100000780 281043Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2013-0295European Commission https://doi.org/10.13039/501100000780 665919open accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2162162026-06-06T12:50:31Z
dc.title.none.fl_str_mv Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches
title Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches
spellingShingle Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches
Quadrado del Burgo, Ramón|||0000-0002-8344-2319
Effective magnetic anisotropy
Ferromagnetic and anti-ferromagnetic
First-principles calculation
Interfacial magnetic anisotropies
Magnetic anisotropy energy
Magnetic tunnel junction
Spin reorientation transitions
Tunneling magnetoresistance
title_short Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches
title_full Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches
title_fullStr Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches
title_full_unstemmed Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches
title_sort Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches
dc.creator.none.fl_str_mv Quadrado del Burgo, Ramón|||0000-0002-8344-2319
Oroszlány, László
Deák, András
Ostler, Thomas A.
Meo, Andrea
Chepulskii, Roman V.
Apalkov, Dmytro
Evans, Richard F. L.
Szunyogh, László
Chantrell, Roy W.|||0000-0001-5410-5615
author Quadrado del Burgo, Ramón|||0000-0002-8344-2319
author_facet Quadrado del Burgo, Ramón|||0000-0002-8344-2319
Oroszlány, László
Deák, András
Ostler, Thomas A.
Meo, Andrea
Chepulskii, Roman V.
Apalkov, Dmytro
Evans, Richard F. L.
Szunyogh, László
Chantrell, Roy W.|||0000-0001-5410-5615
author_role author
author2 Oroszlány, László
Deák, András
Ostler, Thomas A.
Meo, Andrea
Chepulskii, Roman V.
Apalkov, Dmytro
Evans, Richard F. L.
Szunyogh, László
Chantrell, Roy W.|||0000-0001-5410-5615
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Effective magnetic anisotropy
Ferromagnetic and anti-ferromagnetic
First-principles calculation
Interfacial magnetic anisotropies
Magnetic anisotropy energy
Magnetic tunnel junction
Spin reorientation transitions
Tunneling magnetoresistance
topic Effective magnetic anisotropy
Ferromagnetic and anti-ferromagnetic
First-principles calculation
Interfacial magnetic anisotropies
Magnetic anisotropy energy
Magnetic tunnel junction
Spin reorientation transitions
Tunneling magnetoresistance
description Fe/MgO-based magnetic tunnel junctions are among the most promising candidates for spintronic devices due to their high thermal stability and high tunneling magnetoresistance. Despite its apparent simplicity, the nature of the interactions between the Fe and MgO layers leads to complex finite-size effects and temperature-dependent magnetic properties which must be carefully controlled for practical applications. In this article, we investigate the electronic, structural, and magnetic properties of MgO/Fe/MgO sandwiches using first-principles calculations and atomistic spin modeling based on a fully parametrized spin Hamiltonian. We find a large contribution to the effective interfacial magnetic anisotropy from the two-ion exchange energy. Minimization of the total energy using atomistic simulations shows a surprising spin-spiral ground-state structure at the interface owing to frustrated ferromagnetic and antiferromagnetic interactions, leading to a reduced Curie temperature and strong layerwise temperature dependence of the magnetization. The different temperature dependences of the interface and bulklike layers results in an unexpected nonmonotonic temperature variation of the effective magnetic-anisotropy energy and temperature-induced spin-reorientation transition to an in-plane magnetization at low temperatures. Our results demonstrate the intrinsic physical complexity of the pure Fe/MgO interface and the role of elevated temperatures providing insight when interpreting experimental data of nanoscale magnetic tunnel junctions.
publishDate 2018
dc.date.none.fl_str_mv 2
2018-01-01
2018
2018-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/216216
https://dx.doi.org/urn:doi:10.1103/PhysRevApplied.9.054048
url https://ddd.uab.cat/record/216216
https://dx.doi.org/urn:doi:10.1103/PhysRevApplied.9.054048
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission https://doi.org/10.13039/501100000780 281043
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2013-0295
European Commission https://doi.org/10.13039/501100000780 665919
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869413705843736576
score 15,300719

Similares en LA Referencia