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, simila...

Full description

Saved in:
Bibliographic Details
Published inPhysical review letters Vol. 105; no. 20; p. 207205
Main Authors Sepioni, M, Nair, R R, Rablen, S, Narayanan, J, Tuna, F, Winpenny, R, Geim, A K, Grigorieva, I V
Format Journal Article
LanguageEnglish
Published United States 12.11.2010
Online AccessGet more information

Cover

More Information
Summary: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 50 K. The measurements yield a single species of defects responsible for the paramagnetism, with approximately one magnetic moment per typical graphene crystallite.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.105.207205