Irradiation enhanced paramagnetism on graphene nanoflakes
Ney, A, Papakonstantinou, P, Kumar, A, Shang, N-G and Peng, N (2011) Irradiation enhanced paramagnetism on graphene nanoflakes Applied Physics Letters, 99 (10). ISSN 0003-6951
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Official URL: http://dx.doi.org/10.1063/1.3628245
We have studied the magnetization of vertically aligned graphene nanoflakes irradiated with nitrogen ions of 100 KeV energy and doses in the range 10¹¹–10¹⁷ ions/cm². The non-irradiated graphene nanoflakes show a paramagnetic contribution, which is increased progressively by ion irradiation at low doses up to 10¹⁵/cm². However, further increase on implantation dose reduces the magnetic moment which coincides with the onset of amorphization as verified by both Raman and x-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.
Copyright 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
The following article appeared in Applied Physics Letters, 99 (10) 102504 and may be found at A. Ney et al., Appl. Phys.Lett. 99, 102504 (2011)
|Divisions:||Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Ion Beam Centre|
|Deposited By:||Symplectic Elements|
|Deposited On:||07 Dec 2011 15:31|
|Last Modified:||16 Mar 2013 14:45|
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