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 achievable area density of magnetic recording by three orders of magnitude. As a model system, Co_2-benzene with a diameter of 0.5 nm is investigated. It shows a magnetic anisotropy in the order of 0.1 eV per molecule, large enough to store permanently one 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. It is suggested that the subnanometer bits can be written by simultaneous application of a moderate magnetic and a strong electric field.

13 pages, 4 figures

References in corpus (2)

• Magnetic anisotropies of late transition metal atomic clusters
• Interplay of structure and spin-orbit strength in magnetism of metal-benzene sandwiches: from single molecules to infinite wires

Cited by in corpus (20)

• Electrically tunable quantum anomalous Hall effect in 5d transition-metal adatoms on graphene
• Giant magnetic anisotropy of transition-metal dimers on defected graphene
• Magnetic properties of small Pt-capped Fe, Co and Ni clusters: A density functional theory study
• Giant magnetic anisotropy of Co, Ru, and Os adatoms on MgO (001) surface
• Magnetism of cobalt nanoclusters on graphene on iridium
• Beyond the upper limit of magnetic anisotropy in two-dimensional transition metal dichalcogenides
• Gate-Tunable Exchange Coupling Between Cobalt Clusters on Graphene
• CoIr-carbon complexes with magnetic anisotropies larger than 0.2 eV: a density-functional-theory prediction
• Chemical Bonding of Transition-metal Co${}_{13}$ Clusters with Graphene
• Scanning tunneling spectroscopy and Dirac point resonances due to a single Co adatom on gated graphene
• Electronic ground states of Fe${}_2^{+}$ and Co${}_2^{+}$ as determined by x-ray absorption and x-ray magnetic circular dichroism spectroscopy
• Slow Spin Relaxation in Single Endohedral Fullerene Molecules
• Voltage-controlled spin injection with an endohedral fullerene CoC${}_{60}$ dimer
• Electronic and magnetic properties of Co_n Mo_m nanoclusters with n+m = x and 2<=x<=6 atoms from DFT calculations
• Spin-spin correlations of magnetic impurities in graphene
• Formation of localized magnetic states in graphene in hollow-site adsorbed adatoms
• Tunability of Magnetic Anisotropy of Co on Two-Dimensional Materials by Tetrahedral Bonding
• First principles study of iron-based molecule grafted on graphene
• Giant magnetic anisotropy energy and long coherence time of uranium substitution on defected Al2O3(0001)
• 3d-oxide molecules to tailor large magnetic anisotropy energies on MgO films