Limits on intrinsic magnetism in graphene

Details Limits on intrinsic magnetism in graphene Limits on intrinsic magnetism in graphene

2010-07-02

arxiv.org/abs/1007.0423v2

Phys. Rev. Lett. 105, 207205 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

2nd version, modified in response to comments

Scientific paper

10.1103/PhysRevLett.105.207205

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.

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