title: Co dimers on hexagonal carbon rings proposed as subnanometer magnetic storage bits.
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, Co2 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.
authors.affiliation: IFW Dresden e.V., Post Office Box 270116, D-01171 Dresden, Germany.
authors.forename: Ruijuan
authors.initials: R
authors.lastname: Xiao
authors.forename: Daniel
authors.initials: D
authors.lastname: Fritsch
authors.forename: Michael D
authors.initials: MD
authors.lastname: Kuz'min
authors.forename: Klaus
authors.initials: K
authors.lastname: Koepernik
authors.forename: Helmut
authors.initials: H
authors.lastname: Eschrig
authors.forename: Manuel
authors.initials: M
authors.lastname: Richter
authors.forename: Knut
authors.initials: K
authors.lastname: Vietze
authors.forename: Gotthard
authors.initials: G
authors.lastname: Seifert