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Irradiation enhanced paramagnetism on graphene nanoflakes

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Ney, A., Papakonstantinou, P., Ajay, K., Shang, NG and Peng, N. (2011) Irradiation enhanced paramagnetism on graphene nanoflakes. Applied Physics Letters, 99 . pp. 102504-1. [Journal article]

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URL: http://link.aip.org/link/?APL/99/102504

DOI: 10.1063/1.3628245

Abstract

We have studied the magnetization of vertically aligned graphene nanoflakes irradiated withnitrogen ions of 100 KeV energy and doses in the range 10^11–10^17 ions/cm^2. The non-irradiated graphene nanoflakes show a paramagnetic contribution, which is increased progressively by ion irradiation at low doses up to 10^15/cm^2. However, further increase on implantation dose reduces the magnetic moment which coincides with the onset of amorphization as verified by both Raman andx-ray photoelectron spectroscopic data. Overall, our results demonstrate the absence of ferromagnetism on either implanted or unimplanted samples from room temperature down to a temperature of 5 K.

Item Type:Journal article
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:19945
Deposited By:Professor Pagona Papakonstantinou
Deposited On:13 Sep 2011 15:15
Last Modified:13 Sep 2011 15:15

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