Measurement of the Induced Magnetic Polarisation of Rotated-Domain Graphene Grown on Co Film with Polarised Neutron Reflectivity

In this paper, we determine the magnetic moment induced in graphene when grown on a cobalt film using polarised neutron reflectivity (PNR). A magnetic signal in the graphene was detected by X-ray magnetic circular dichroism (XMCD) spectra at the C K-edge. From the XMCD sum rules an estimated magneti...

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Detalles Bibliográficos
Autores principales: Aboljadayel, Razan Omar M., Kinane, Christy John, Vaz, Carlos Antonio Fernandes, Love, David Michael, Martin, Marie-Blandine, Cabrero-Vilatela, Andrea, Braeuninger-Weimer, Philipp, Ionescu, Adrian, Caruana, Andrew John, Charlton, Timothy Randall, Llandro, Justin, Monteiro, Pedro Manuel da Silva, Barnes, Crispin Henry William, Hofmann, Stephan, Langridge, Sean
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10574451/
https://www.ncbi.nlm.nih.gov/pubmed/37836260
http://dx.doi.org/10.3390/nano13192620
Descripción
Sumario:In this paper, we determine the magnetic moment induced in graphene when grown on a cobalt film using polarised neutron reflectivity (PNR). A magnetic signal in the graphene was detected by X-ray magnetic circular dichroism (XMCD) spectra at the C K-edge. From the XMCD sum rules an estimated magnetic moment of 0.3 [Formula: see text] (B)/C atom, while a more accurate estimation of 0.49 [Formula: see text] (B)/C atom was obtained by carrying out a PNR measurement at 300 K. The results indicate that the higher magnetic moment in Co is counterbalanced by the larger lattice mismatch between the Co-C (1.6%) and the slightly longer bond length, inducing a magnetic moment in graphene that is similar to that reported in Ni/graphene heterostructures.

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