Magnetism in graphite oxide: The role of epoxy groups
Strongly Correlated Electrons
2011-02-24 v2
Abstract
We investigate the magnetism in graphite by controlled oxidation. Our approach renders graphite an insulator while maintaining its structure. Fourier transform infrared spectroscopy and X-ray absorption near edge structure spectra reveal that graphite oxide has epoxy groups on its surface and it is not thermally stable. Magnetic susceptibility data exhibit negative Curie temperature, field irreversibility, and slow relaxation. The magnetic properties diminish after the epoxy groups are destroyed. The overall results indicate the unexpected magnetism is associated with the presence of epoxy groups.
Keywords
Cite
@article{arxiv.1005.5580,
title = {Magnetism in graphite oxide: The role of epoxy groups},
author = {D. W. Lee and J. M. Cole and J. W. Seo and S. S. Saxena and C. H. W. Barnes and E. E. M. Chia and C. Panagopoulos},
journal= {arXiv preprint arXiv:1005.5580},
year = {2011}
}
Comments
This paper has been withdrawn by the author due to an error in dealing with data