Irradiation enhanced paramagnetism on graphene nanoflakes

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

doi:10.1063/1.3628245

Irradiation enhanced paramagnetism on graphene nanoflakes

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

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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.

Original language	English
Pages (from-to)	102504-1
Journal	Applied Physics Letters
Volume	99
DOIs	https://doi.org/10.1063/1.3628245
Publication status	Published (in print/issue) - 2 Aug 2011

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title = "Irradiation enhanced paramagnetism on graphene nanoflakes",

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.",

author = "A. Ney and P. Papakonstantinou and K. Ajay and NG Shang and N. Peng",

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T1 - Irradiation enhanced paramagnetism on graphene nanoflakes

AU - Ney, A.

AU - Papakonstantinou, P.

AU - Ajay, K.

AU - Shang, NG

AU - Peng, N.

PY - 2011/8/2

Y1 - 2011/8/2

N2 - 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.

AB - 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.

U2 - 10.1063/1.3628245

DO - 10.1063/1.3628245

M3 - Article

SN - 1077-3118

VL - 99

SP - 102504

EP - 102501

JO - Applied Physics Letters

JF - Applied Physics Letters

ER -

Irradiation enhanced paramagnetism on graphene nanoflakes

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