Thermally activated processes for ferromagnet intercalation in graphene-heavy metal interfaces
Author
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, PaoloEntity
UAM. Departamento de Física de la Materia CondensadaPublisher
American Chemical SocietyDate
2019-12-25Citation
10.1021/acsami.9b19159
ACS Applied Materials and Interfaces 12.3 (2020): 4088-4096
ISSN
1944-8244 (print); 1944-8252 (online)DOI
10.1021/acsami.9b19159Funded by
This 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)Project
Comunidad de Madrid. P2018/NMT-4321/NANOMAGCOST; Comunidad de Madrid. P2018/NMT-4511/NMAT2D; Gobierno de España. RTI2018-097895-B-C42; Gobierno de España. FIS2016-78591-C3-1-R; Gobierno de España. PGC2018-098613-B-C21; Gobierno de España. PGC2018-093291-B-I00; Gobierno de España. FIS2015-67367-C2-1-P; Gobierno de España. PCIN-2015-111; Gobierno de España. MDM-2014-0377Editor's Version
https://doi.org/10.1021/acsami.9b19159Subjects
Epitaxy; Graphene; Oxides; Photoemission spectroscopy; Scanning tunnel microscopy; Spin-orbit coupling; Surface science; FísicaRights
© 2019 American Chemical SocietyAbstract
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
Files in this item
Google Scholar:Ajejas, Fernando
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Anadon, Alberto
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Gudin, Adrian
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Diez, José Manuel
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Ayani, Cosme G.
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Olleros-Rodríguez, Pablo
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De Melo Costa, Leticia
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Navío Bernabeu, Cristina
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Gutierrez, Alejandro
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Calleja, Fabian
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López Vázquez de Parga, Amadeo
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Miranda Soriano, Rodolfo
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Camarero de Diego, Julio
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Perna, Paolo
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