Skip to main content
SpringerLink
Log in

Model predictions and experimental characterization of Co-Pt alloy clusters

  • Structure and Thermodynamics of Free Clusters
  • Published:
The European Physical Journal D Aims and scope Submit manuscript

Abstract.

Model and real cobalt-platinum alloy clusters are compared in terms of structure, composition and segregation. Canonical and semi grand canonical Metropolis Monte Carlo simulations are performed to model these clusters, using embedded atom (EAM) and modified embedded atom (MEAM) potentials. All of them correctly predict the bulk L12 Co3Pt and CoPt3 structures as well as the L10 CoPt phase. However, the lattice parameters, phase stability and the L10-fcc order-disorder transition temperature are at variance. Segregation predictions with EAM and MEAM potentials are contradictory. Experimentally, mixed clusters with various compositions were deposited by Low Energy Cluster Beam on amorphous carbon at room temperature. Their size distribution, crystalline structure and composition were examined by Transmission Electron Microscopy (TEM). Clusters with the same size distributions were modelled. Both experiment and modelling show their crystallographic parameters to continuously correspond to the fcc CoPt chemically disordered phase. Diffraction measurements indicate surface segregation of the specie in excess, in agreement with EAM predictions for the Co-rich phase. The consequences on magnetic properties are discussed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • S. Sun, C.B. Murray, D. Weller, L. Folks, A. Moser, Science 287, 1989 (2000)

    Article  ADS  Google Scholar 

  • D.J. Sellmyer, M. Yu, R.D. Kirby, Nanostruct. Mat. 12, 1021 (1999)

    Article  Google Scholar 

  • B. Yang, M. Asta, O.N. Mryasov, T.J. Klemmer, R.W. Chantrell, Scripta Mat. 53, 417 (2005)

    Article  Google Scholar 

  • S.I. Park, B.-J. Lee, H.M. Lee, Scripta Mater. 45, 495 (2001)

    Article  Google Scholar 

  • E.E. Zhurkin, M. Hou, J. Phys.: Condens. Matter 12, 6735 (2000)

    Article  ADS  Google Scholar 

  • R.A. Johnson, Phys. Rev. B 39, 12554 (1989)

    Article  ADS  Google Scholar 

  • A. Johnson, Phys. Rev. B 41, 9717 (1990)

    Article  ADS  Google Scholar 

  • M. Hou, M. El Azzaoui, H. Pattyn, J. Verheyden, G. Koops, G. Zhang, Phys. Rev. B 62, 5117 (2000)

    Article  ADS  Google Scholar 

  • M.I. Baskes, Phys. Rev. B 46, 2727 (1992)

    Article  ADS  Google Scholar 

  • M.I. Baskes, R.A. Johnson, Modell. Simul. Mater. Sci. Eng. 2, 147 (1994)

    Article  ADS  Google Scholar 

  • G. Wang, M.A. Van Hove, P.N. Ross, M.I. Baskes, J. Chem. Phys. 121, 5410 (2004)

    Article  ADS  Google Scholar 

  • M.I. Baskes, Mater. Chem. Phys. 50, 152 (1997)

    Article  ADS  Google Scholar 

  • H. Rose, J.R. Smith, F. Guinea, J. Ferrante, Phys. Rev. B 29, 2963 (1984)

    Article  ADS  Google Scholar 

  • G. Wang, M.A. Van Hove, P.N. Ross, M.I. Baskes, J. Chem. Phys. 121, 5410 (2004)

    Article  ADS  Google Scholar 

  • D. Chen, M. Yan, Y.F. Liu, Sripta Mater. 40, 913 (1999)

    Article  Google Scholar 

  • A. Perez, P. Mélinon, V. Dupuis, P. Jensen, B. Prével, J. Tuaillon, L. Bardotti, C. Martet, M. Treilleux, M. Broyer, M. Pellarin, J.L. Vialle, B. Palpant, J. Lermé, J. Phys. D Appl. Phys. 30, 709 (1997)

    Article  ADS  Google Scholar 

  • C. Leroux, M.C. Cadeville, V. Pierron-Bohnes, G. Inden, F. Hinz, J. Phys. F 18, 2033 (1988)

    Article  ADS  Google Scholar 

  • P. Moskovkin, M. Hou, J. Alloys Comp. (in press)

  • R. Van Hardeveld, F. Hartog, Surf. Sci. 15, 189 (1969)

    Article  Google Scholar 

  • L. Favre, V. Dupuis, E. Bernstein, S. Stanescu, P. Mélinon, A. Perez, T. Epicier, J.P. Simon, J.M. Tonnerre, D. Babonneau, Phys. Rev. B 74, 014439 (2006)

    Article  ADS  Google Scholar 

  • V. Dupuis, M. Jamet, J. Tuaillon-Combes, L. Favre, S. Stanescu, M. Treilleux, E. Bernstein, P. Mélinon, A. Perez, Review of “Recent research Developments in Magnetism and Magnetic Materials" 1, (2003) 101 Transworld Research Network

  • M. Hansen, K. Anderko, Constitution of Binary Alloys (McGraw-Hill, New York, 1958), pp. 467, 516

  • A. Bonakdarpour et al., J. Electrochem. Soc. 152, A61 (2005)

  • M. Maret, M.C. Cadeville, W. Staiger, E. Beaurepaire, R. Poinsot, A. Herr, Thin Solid Film 275, 224 (1996)

    Article  Google Scholar 

  • M. Maret, M.C. Cadeville, R. Poinsot, A. Herr, E. Beaurepaire, C. Monier, J. Mag. Mag. Mat. 166, 45 (1997)

    Article  ADS  Google Scholar 

  • A.I. Shapiro, P.W. Rooney, M.Q. Tran, F. Hellman, K.M. Ring, K.L. Kavanagh, B. Rellinghauss, D. Weller, Phys. Rev. B 60, 12826 (1999)

    Article  ADS  Google Scholar 

  • S. Rohart, C. Raufast, L. Favre, E. Bernstein, E. Bonet-Orozco, V. Dupuis, Phys. Rev. B 74, 104408 (2006)

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Physique des Solides Irradiés et des Nanostructures, CP 234, Université Libre de Bruxelles, Bd du Triomphe, 1050, Bruxelles, Belgium

    P. Moskovkin, S. Pisov & M. Hou

  2. Laboratoire de Physique de la Matière Condensée et Nanostructures, Université Lyon 1, CNRS UMR 5586, Domaine Scientifique de la Doua, 69622, Villeurbanne Cedex, France

    C. Raufast, F. Tournus, L. Favre & V. Dupuis

Authors
  1. P. Moskovkin
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. S. Pisov
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. M. Hou
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. C. Raufast
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. F. Tournus
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. L. Favre
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. V. Dupuis
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to M. Hou.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Moskovkin, P., Pisov, S., Hou, M. et al. Model predictions and experimental characterization of Co-Pt alloy clusters. Eur. Phys. J. D 43, 27–32 (2007). https://doi.org/10.1140/epjd/e2007-00066-0

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1140/epjd/e2007-00066-0

PACS.

Search

Navigation