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Applied Physics Letters / Volume 97 / Issue 23 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 97, 232501 (2010); http://dx.doi.org/10.1063/1.3520488 (3 pages)

CoIr-carbon complexes with magnetic anisotropies larger than 0.2 eV: A density-functional-theory prediction

Ruijuan Xiao, Michael D. Kuz’min, Klaus Koepernik, and Manuel Richter

IFW Dresden e.V., P.O. Box 270116, D-01171 Dresden, Germany

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(Received 27 October 2010; accepted 5 November 2010; published online 6 December 2010)

We report a density-functional study of the heteronuclear CoIr dimer adsorbed on benzene or graphene. In either case, CoIr prefers an upright position above the center of a carbon hexagon with the Co atom next to it. The Ir atom stays away from the carbon ring and thus preserves its free-atom-like properties. This results in a very large magnetic anisotropy of more than 0.2 eV per dimer. So high a value should suffice for long-term data storage at the temperature of liquid nitrogen.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

adsorbed layers, cobalt alloys, density functional theory, graphene, iridium alloys, magnetic anisotropy, organic compounds

PACS

  • 75.30.Gw

    Magnetic anisotropy

  • 31.15.es

    Applications of density-functional theory (e.g., to electronic structure and stability; defect formation; dielectric properties, susceptibilities; viscoelastic coefficients; Rydberg transition frequencies)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3520488

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    R. Xiao, D. Fritsch, M. D. Kuz'min, K. Koepernik, H. Eschrig, M. Richter, K. Vietze, and G. Seifert, Phys. Rev. Lett. 103, 187201 (2009).

    R. Xiao, D. Fritsch, M. D. Kuz'min, K. Koepernik, M. Richter, K. Vietze, and G. Seifert, Phys. Rev. B 82, 205125 (2010).

    H. Brooks, Phys. Rev. 58, 909 (1940).

    T. O. Strandberg, C. M. Canali, and A. H. MacDonald, Phys. Rev. B 77, 174416 (2008).

    P. Bloński and J. Hafner, Phys. Rev. B 79, 224418 (2009).

    L. Fernández-Seivane and J. Ferrer, Phys. Rev. Lett. 99, 183401 (2007).

    I. Cabria, B. Nonas, R. Zeller, and P. H. Dederichs, Phys. Rev. B 65, 054414 (2002).

    K. Koepernik and H. Eschrig, Phys. Rev. B 59, 1743 (1999).

    J. P. Perdew, K. Burke, and M. Ernzerhof, Phys. Rev. Lett. 77, 3865 (1996).

    O. Eriksson, M. S. S. Brooks, and B. Johansson, Phys. Rev. B 41, 7311 (1990).


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