Co Dimers on Hexagonal Carbon Rings Proposed as Subnanometer Magnetic Storage Bits

Ruijuan Xiao, Daniel Fritsch, Michael D. Kuz’min, Klaus Koepernik, Helmut Eschrig, Manuel Richter, Knut Vietze, and Gotthard Seifert
Phys. Rev. Lett. 103, 187201 – Published 26 October 2009

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.

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  • Received 28 March 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.187201

©2009 American Physical Society

Authors & Affiliations

Ruijuan Xiao, Daniel Fritsch, Michael D. Kuz’min, Klaus Koepernik, Helmut Eschrig, and Manuel Richter

  • IFW Dresden e.V., Post Office Box 270116, D-01171 Dresden, Germany

Knut Vietze and Gotthard Seifert

  • Physikalische Chemie, Technische Universität Dresden, D-01062 Dresden, Germany

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Issue

Vol. 103, Iss. 18 — 30 October 2009

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