Nanomaterials
(Sep 2023)
Measurement of the Induced Magnetic Polarisation of Rotated-Domain Graphene Grown on Co Film with Polarised Neutron Reflectivity
Razan Omar M. Aboljadayel,
Christy John Kinane,
Carlos Antonio Fernandes Vaz,
David Michael Love,
Marie-Blandine Martin,
Andrea Cabrero-Vilatela,
Philipp Braeuninger-Weimer,
Adrian Ionescu,
Andrew John Caruana,
Timothy Randall Charlton,
Justin Llandro,
Pedro Manuel da Silva Monteiro,
Crispin Henry William Barnes,
Stephan Hofmann,
Sean Langridge
Affiliations
Razan Omar M. Aboljadayel
Cavendish Laboratory, Physics Department, University of Cambridge, Cambridge CB3 0HE, UK
Christy John Kinane
ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Oxon OX11 0QX, UK
Carlos Antonio Fernandes Vaz
Swiss Light Source, Paul Scherrer Institut (PSI), 5232 Villigen, Switzerland
David Michael Love
Cavendish Laboratory, Physics Department, University of Cambridge, Cambridge CB3 0HE, UK
Marie-Blandine Martin
Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK
Andrea Cabrero-Vilatela
Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK
Philipp Braeuninger-Weimer
Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK
Adrian Ionescu
Cavendish Laboratory, Physics Department, University of Cambridge, Cambridge CB3 0HE, UK
Andrew John Caruana
ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Oxon OX11 0QX, UK
Timothy Randall Charlton
ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Oxon OX11 0QX, UK
Justin Llandro
Cavendish Laboratory, Physics Department, University of Cambridge, Cambridge CB3 0HE, UK
Pedro Manuel da Silva Monteiro
Cavendish Laboratory, Physics Department, University of Cambridge, Cambridge CB3 0HE, UK
Crispin Henry William Barnes
Cavendish Laboratory, Physics Department, University of Cambridge, Cambridge CB3 0HE, UK
Stephan Hofmann
Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK
Sean Langridge
ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Oxon OX11 0QX, UK
DOI
https://doi.org/10.3390/nano13192620
Journal volume & issue
Vol. 13,
no. 19
Abstract
Read online
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 μB/C atom, while a more accurate estimation of 0.49 μB/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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