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Graphene Supported Graphone/Graphane Bilayer Nanostructure Material for Spintronics

Ray, Sekhar C., Soin, Navneet, Makgato, Thuto, Chuang, C. H., Pong, W. F., Roy, Susanta S., Ghosh, Sarit K., Strydom, André M. and McLaughlin, JAD (2014) Graphene Supported Graphone/Graphane Bilayer Nanostructure Material for Spintronics. Scientific Reports, 4 . [Journal article]

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URL: http://dx.doi.org/10.1038/srep03862

DOI: doi:10.1038/srep03862

Abstract

We report an investigation into the magnetic and electronic properties of partially hydrogenated vertically aligned few layers graphene (FLG) synthesized by microwave plasma enhanced chemical vapor deposition. The FLG samples are hydrogenated at different substrate temperatures to alter the degree of hydrogenation and their depth profile. The unique morphology of the structure gives rise to a unique geometry in which graphane/graphone is supported by graphene layers in the bulk, which is very different from other widely studied structures such as one-dimensional nanoribbons. Synchrotron based x-ray absorption fine structure spectroscopy measurements have been used to investigate the electronic structure and the underlying hydrogenation mechanism responsible for the magnetic properties. While ferromagnetic interactions seem to be predominant, the presence of antiferromagnetic interaction was also observed. Free spins available via the conversion of sp2 to sp3 hybridized structures, and the possibility of unpaired electrons from defects induced upon hydrogenation are thought to be likely mechanisms for the observed ferromagnetic orders.

Item Type:Journal article
Keywords:Electronic properties and devices Graphene
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:36803
Deposited By: Professor James McLaughlin
Deposited On:15 Feb 2017 13:41
Last Modified:17 Oct 2017 16:27

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