Limits on intrinsic magnetism in graphene
Mesoscale and Nanoscale Physics
2010-11-24 v2 Materials Science
Abstract
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.
Keywords
Cite
@article{arxiv.1007.0423,
title = {Limits on intrinsic magnetism in graphene},
author = {M. Sepioni and R. R. Nair and S. Rablen and J. Narayanan and F. Tuna and R. Winpenny and A. K. Geim and I. V. Grigorieva},
journal= {arXiv preprint arXiv:1007.0423},
year = {2010}
}
Comments
2nd version, modified in response to comments