Magnetic Surface Enhancement and the Curie Temperature in Ising Thin Films

  • S. Meza-Aguilar
  • F. Aguilera-Granja
  • J. L. Morán-López

Abstract

We study the magnetic surface enhancement and the Curie temperature in ferromagnetic Ising thin films as a function of the surface orientations and structure. We use a simplified version of the cluster variation method in the pair approximation that only considers as inequivalent those sites on the surface, while all the internal sites are considered as equivalent regardless of the position. We calculate the critical value of the surface interaction J SC , beyond which the surface dominates the magnetic properties of the system. Our results are in agreement with those of the reaction field approximation and the renormalization group theory for the case of simple cubic lattice thin films.

Keywords

Critical Temperature Curie Temperature Surface Interaction Surface Orientation Internal Site 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. L. M. Falicov et al., J. Mater. Res. 5, 1299 (1990).CrossRefGoogle Scholar
  2. 2.
    D. Weller, S. F. Alvarado, W. Gudat, Schröder, and M. Campagna, Phys. Rev. Lett. 54, 1555 (1985).CrossRefGoogle Scholar
  3. 3.
    F. Aguilera-Granja and J. L. Moran-López, Phys. Rev. B 31, 7146 (1985)CrossRefGoogle Scholar
  4. F. Aguilera-Granja and J. L. Moran-López, Solid State Commun. 74, 155 (1990).CrossRefGoogle Scholar
  5. 4.
    J. M. Sanchez and J. L. Moran-López, Springer Proc. Phys. 14, ( Springer, Berlin, Heidelberg, 1986 )Google Scholar
  6. J. M. Sanchez and J. L. Moran-López, Springer Proc. Phys. 50, ( Springer, Berlin, Heidelberg, 1990 ).Google Scholar
  7. 5.
    D. P. Landau and K. Binder J. Magn. Magn. Mater. 841, 104–107 (1992).Google Scholar
  8. 6.
    C. Tsallis, Magnetism, Magnetic Materials and Their Applications, edited by F. Leccabue and J. L. Sanchez-Llamazares, ( IOP Publishing LTD, 1992 ).Google Scholar
  9. 7.
    R. Kikuchi, Phys. Rev. 81, 988 (1951)CrossRefGoogle Scholar
  10. R. Kikuchi, Prog. Theor. Phys. 115, 165 (1994).CrossRefGoogle Scholar
  11. 8.
    W. Hellenthal, Z. Phys. 170, 303 (1962).CrossRefGoogle Scholar
  12. 9.
    V. Ilkovic, Surf. Sci. 365, 168 (1996).CrossRefGoogle Scholar
  13. 10.
    T. Kaneyoshi, Phys. Rev. B 39, 557 (1989).CrossRefGoogle Scholar
  14. 11.
    T. W. Burkhard and E. Eisenrieger, Phys. Rev. B 16, 3213 (1977).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • S. Meza-Aguilar
    • 1
  • F. Aguilera-Granja
    • 2
  • J. L. Morán-López
    • 3
  1. 1.Institut de Physique el Chimie des Matériaux de StrasburgGEMM, UMR46, CNRS-ULPStarsburg CedexFrance
  2. 2.Departamento de Física TeóricaUniversidad de ValladolidValladolidSpain
  3. 3.Instituto de FísicaUniversidad Autónoma de San Luis PotosíSan Luis Potosí, S.L.P.Mexico

Personalised recommendations