Abstract
It is demonstrated by means of density functional and ab initio quantum chemical calculations, that transition-metal–carbon systems have the potential to enhance the presently available area density of magnetic recording by 3 orders of magnitude. As a model system, benzene with a diameter of 0.5 nm is investigated. It shows a magnetic anisotropy of the order of 0.1 eV per molecule, large enough to store permanently 1 bit of information at temperatures considerably larger than 4 K. A similar performance can be expected, if cobalt dimers are deposited on graphene or on graphite.
- Received 28 March 2009
DOI:https://doi.org/10.1103/PhysRevLett.103.187201
©2009 American Physical Society