Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfaces

The development of graphene (Gr) spintronics requires the ability to engineer epitaxial Gr heterostructures with interfaces of high quality, in which the intrinsic properties of Gr are modified through proximity with a ferromagnet to allow for efficient room temperature spin manipulation or the stab...

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Autores: Ajejas, Fernando, Anadon, Alberto, Gudin, Adrian, Diez, José Manuel, Ayani, Cosme G., Olleros-Rodríguez, Pablo, De Melo Costa, Leticia, Navío Bernabeu, Cristina, Gutierrez, Alejandro, Calleja, Fabian, López Vázquez de Parga, Amadeo, Miranda Soriano, Rodolfo, Camarero de Diego, Julio, Perna, Paolo
Formato: artículo
Fecha de publicación:2019
País:España
Recursos:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/699481
Acesso em linha:http://hdl.handle.net/10486/699481
https://dx.doi.org/10.1021/acsami.9b19159
Access Level:acceso abierto
Palavra-chave:Epitaxy
Graphene
Oxides
Photoemission spectroscopy
Scanning tunnel microscopy
Spin-orbit coupling
Surface science
Física
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spelling Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfacesAjejas, FernandoAnadon, AlbertoGudin, AdrianDiez, José ManuelAyani, Cosme G.Olleros-Rodríguez, PabloDe Melo Costa, LeticiaNavío Bernabeu, CristinaGutierrez, AlejandroCalleja, FabianLópez Vázquez de Parga, AmadeoMiranda Soriano, RodolfoCamarero de Diego, JulioPerna, PaoloEpitaxyGrapheneOxidesPhotoemission spectroscopyScanning tunnel microscopySpin-orbit couplingSurface scienceFísicaThe development of graphene (Gr) spintronics requires the ability to engineer epitaxial Gr heterostructures with interfaces of high quality, in which the intrinsic properties of Gr are modified through proximity with a ferromagnet to allow for efficient room temperature spin manipulation or the stabilization of new magnetic textures. These heterostructures can be prepared in a controlled way by intercalation through graphene of different metals. Using photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM), we achieve a nanoscale control of thermally activated intercalation of a homogeneous ferromagnetic (FM) layer underneath epitaxial Gr grown onto (111)-oriented heavy metal (HM) buffers deposited, in turn, onto insulating oxide surfaces. XPS and STM demonstrate that Co atoms evaporated on top of Gr arrange in 3D clusters and, upon thermal annealing, penetrate through and diffuse below Gr in a 2D fashion. The complete intercalation of the metal occurs at specific temperatures, depending on the type of metallic buffer. The activation energy and the optimum temperature for the intercalation processes are determined. We describe a reliable method to fabricate and characterize in situ high-quality Gr-FM/HM heterostructures, enabling the realization of novel spin-orbitronic devices that exploit the extraordinary properties of GrThis research was supported by the Regional Government of Madrid through projects P2018/NMT-4321 (NANOMAGCOST-CM) and P2018/NMT-4511 (NMAT2D) and by the Spanish Ministry of Economy and Competitiveness (MINECO) through projects RTI2018-097895-B-C42, FIS2016-78591-C3-1-R, PGC2018-098613-B-C21, PGC2018-093291-B-I00, FIS2015-67367-C2-1-P, and PCIN-2015-111 (FLAGERA JTC2015 Graphene Flagship “SOgraph”). IFIMAC acknowledges support from the ″Maria de Maeztu″ programme for units of Excellence in R&D (MDM-2014-0377). IMDEA Nanoscience is supported by the “Severo Ochoa” programme for the Centres of Excellence in R&D, MINECO (grant number SEV-2016-0686)American Chemical SocietyDepartamento de Física de la Materia CondensadaFacultad de Ciencias20192019-12-25research articlehttp://purl.org/coar/resource_type/c_2df8fbb1AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/699481https://dx.doi.org/10.1021/acsami.9b19159reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6994812026-06-23T12:46:27Z
dc.title.none.fl_str_mv Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfaces
title Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfaces
spellingShingle Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfaces
Ajejas, Fernando
Epitaxy
Graphene
Oxides
Photoemission spectroscopy
Scanning tunnel microscopy
Spin-orbit coupling
Surface science
Física
title_short Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfaces
title_full Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfaces
title_fullStr Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfaces
title_full_unstemmed Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfaces
title_sort Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfaces
dc.creator.none.fl_str_mv Ajejas, Fernando
Anadon, Alberto
Gudin, Adrian
Diez, José Manuel
Ayani, Cosme G.
Olleros-Rodríguez, Pablo
De Melo Costa, Leticia
Navío Bernabeu, Cristina
Gutierrez, Alejandro
Calleja, Fabian
López Vázquez de Parga, Amadeo
Miranda Soriano, Rodolfo
Camarero de Diego, Julio
Perna, Paolo
author Ajejas, Fernando
author_facet Ajejas, Fernando
Anadon, Alberto
Gudin, Adrian
Diez, José Manuel
Ayani, Cosme G.
Olleros-Rodríguez, Pablo
De Melo Costa, Leticia
Navío Bernabeu, Cristina
Gutierrez, Alejandro
Calleja, Fabian
López Vázquez de Parga, Amadeo
Miranda Soriano, Rodolfo
Camarero de Diego, Julio
Perna, Paolo
author_role author
author2 Anadon, Alberto
Gudin, Adrian
Diez, José Manuel
Ayani, Cosme G.
Olleros-Rodríguez, Pablo
De Melo Costa, Leticia
Navío Bernabeu, Cristina
Gutierrez, Alejandro
Calleja, Fabian
López Vázquez de Parga, Amadeo
Miranda Soriano, Rodolfo
Camarero de Diego, Julio
Perna, Paolo
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Física de la Materia Condensada
Facultad de Ciencias
dc.subject.none.fl_str_mv Epitaxy
Graphene
Oxides
Photoemission spectroscopy
Scanning tunnel microscopy
Spin-orbit coupling
Surface science
Física
topic Epitaxy
Graphene
Oxides
Photoemission spectroscopy
Scanning tunnel microscopy
Spin-orbit coupling
Surface science
Física
description The development of graphene (Gr) spintronics requires the ability to engineer epitaxial Gr heterostructures with interfaces of high quality, in which the intrinsic properties of Gr are modified through proximity with a ferromagnet to allow for efficient room temperature spin manipulation or the stabilization of new magnetic textures. These heterostructures can be prepared in a controlled way by intercalation through graphene of different metals. Using photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM), we achieve a nanoscale control of thermally activated intercalation of a homogeneous ferromagnetic (FM) layer underneath epitaxial Gr grown onto (111)-oriented heavy metal (HM) buffers deposited, in turn, onto insulating oxide surfaces. XPS and STM demonstrate that Co atoms evaporated on top of Gr arrange in 3D clusters and, upon thermal annealing, penetrate through and diffuse below Gr in a 2D fashion. The complete intercalation of the metal occurs at specific temperatures, depending on the type of metallic buffer. The activation energy and the optimum temperature for the intercalation processes are determined. We describe a reliable method to fabricate and characterize in situ high-quality Gr-FM/HM heterostructures, enabling the realization of novel spin-orbitronic devices that exploit the extraordinary properties of Gr
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-12-25
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
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 http://hdl.handle.net/10486/699481
https://dx.doi.org/10.1021/acsami.9b19159
url http://hdl.handle.net/10486/699481
https://dx.doi.org/10.1021/acsami.9b19159
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
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
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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