Irradiation enhanced paramagnetism on graphene nanoflakes

A. Ney, P. Papakonstantinou, K. Ajay, NG Shang, N. Peng

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)102504-1
JournalApplied Physics Letters
Publication statusPublished (in print/issue) - 2 Aug 2011


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