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Measurement of the Induced Magnetic Polarisation of Rotated-domain Graphene Grown on Co Film With Polarised Neutron Reflectivity
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Peer-reviewed
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Abstract
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 magnetic moment in graphene that is similar to that reported in Ni/graphene heterostructure.
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40 Engineering, 4016 Materials Engineering, 4018 Nanotechnology
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Nanomaterials
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2079-4991
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MDPI AG
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We thank the ISIS Neutron and Muon Source for the provision of beam time (RB1510330 and RB1610424). Some of this work was performed at the Surface and Interface Microscopy (SIM) beamline of the Swiss Light Source (SLS), Paul Scherrer Institute (PSI), Villingen, Switzerland.