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Paper detail

Limits on intrinsic magnetism in graphene

We have studied magnetization of graphene nanocrystals obtained by sonic exfoliation of graphite. No ferromagnetism is detected at any temperature down to 2 K. Neither do we find strong paramagnetism expected due to the massive amount of edge defects. Rather, graphene is strongly diamagnetic, similar to graphite. Our nanocrystals exhibit only a weak paramagnetic contribution noticeable below 50K. The measurements yield a single species of defects responsible for the paramagnetism, with approximately one magnetic moment per typical graphene crystallite.

preprint2010arXivOpen access
M. SepioniR. R. NairS. RablenJ. NarayananF. TunaR. WinpennyA. K. GeimI. V. Grigorieva
cond-mat.mes-hallcond-mat.mtrl-sci
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M. SepioniR. R. NairS. RablenJ. NarayananF. TunaR. WinpennyA. K. GeimI. V. Grigorieva

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