Applied Physics A

, Volume 39, Issue 3, pp 221–225 | Cite as

Exchange interactions in BaFe12O19

  • A. Isalgué
  • A. Labarta
  • J. Tejada
  • X. Obradors
Contributed Papers

Abstract

In the scope of the mean field approximation the nine nearest neighbour exchange interactions existing among the ferric ions in BaFe12O19 hexagonal ferrite have been determined from the experimental sublattice magnetizations. It is shown that these exchange interactions are well explained by means of the superexchange theory. It is also concluded that some direct exchange interaction does exist among the octahedral 4fVI ions. The calculated magnetization, paramagnetic susceptibility, and Curie temperature are in good agreement with the corresponding experimental values. The stability of the collinear Gorter-type magnetic structure of BaFe12O19 is discussed as well.

PACS

75.30 75.50 76.80 

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References

  1. 1.
    J. Smit, H.P.J. Wijn:Ferrites (Philips Technical Library, Eindhoven 1959) pp. 193–228Google Scholar
  2. 2.
    H. Kojima: InFerromagnetic Materials, Vol. 3, ed. by E.P. Wohlfarth (North-Holland, Amsterdam 1983) pp. 305–390Google Scholar
  3. 3.
    W.D. Townes, J.H. Fang, A.S. Perrotta: Z. Krist.125, 437 (1967)Google Scholar
  4. 4.
    X. Obradors, A. Collomb, M. Pernet, D. Samaras, J.C. Joubert: J. Solid State Chem. (in press)Google Scholar
  5. 5.
    E.W. Gorter: Proc. IEEE104 B, 255 (1957)Google Scholar
  6. 6.
    G. Albanese: J. Physique38, C1–85 (1977)Google Scholar
  7. 7.
    G. Albanese, M. Carbucicchio, A. Deriu: Phys. Stat. Sol. (a)23, 351 (1974)Google Scholar
  8. 8.
    O.P. Aleshko-Ozhevskii, I.I. Yamzin: Sov. Phys.-JETP29, 155 (1969)Google Scholar
  9. 9.
    M.I. Namtalishvili, O.P. Aleshko-Ozhevskii, I.I. Yamzin: Sov. Phys.-Solid State13, 2137 (1972)Google Scholar
  10. 10.
    G. Albanese, A. Deriu, E. Lucchini, G. Slokar: Appl. Phys. A26, 45 (1981)Google Scholar
  11. 11.
    L.I. Koroleva, L.P. Mitina: Sov. Phys.-Solid State13, 526 (1971)Google Scholar
  12. 12.
    L.I. Koroleva, L.P. Mitina: Phys. Stat. Sol. (a)5, K55 (1971)Google Scholar
  13. 13.
    M.P. Petrov, A.V. Kunevich: Sov. Phys.-JETP36, 1184 (1973)Google Scholar
  14. 14.
    A. Grill, F. Haberey: Appl. Phys.3, 131 (1974)Google Scholar
  15. 15.
    J.S. Smart:Effective Field Theories of Magnetism (Saunders, Philadelphia 1966) pp. 58–68Google Scholar
  16. 16.
    P.W. Anderson: InMagnetism, Vol. 1, ed. by G.T. Rado, H. Shull (Academic, New York 1963) pp. 25–83Google Scholar
  17. 17.
    J.B. Goodenough:Magnetism and the Chemical Bond (Wiley, New York 1966) pp. 157–185Google Scholar
  18. 18.
    R.L. Streever: Phys. Rev.186, 285 (1969)Google Scholar
  19. 19.
    K. Kareyama, K. Kohn, K. Uematsu: J. Phys. Soc. Jpn.29, 791 (1970)Google Scholar
  20. 20.
    R. Aleonard: J. Phys. Chem. Solids15, 167 (1960)Google Scholar
  21. 21.
    B.T. Shirk, W.R. Buessem: J. Appl. Phys.40, 1294 (1969)Google Scholar
  22. 22.
    E.W. Gorter: Philips Res. Rep.9, 295 (1954)Google Scholar
  23. 23.
    L. Néel: Ann. Phys.3, 137 (1948)Google Scholar
  24. 24.
    R. Pauthenet: Ann. Phys.3, 429 (1958)Google Scholar
  25. 25.
    G.T. Rado, V.J. Folen: J. Appl. Phys.31, 62 (1960)Google Scholar
  26. 26.
    C.M. Srivastava, G. Srinivasan, N.G. Nanadikar: Phys. Rev. B19, 499 (1979)Google Scholar
  27. 27.
    X. Obradors, A. Isalgué, A. Collomb, M. Pernet, J. Rodriguez, J. Tejada, J.C. Joubert: IEEE Trans. MAG-20, 1636 (1984)Google Scholar
  28. 28.
    X. Obradors, A. Collomb, M. Pernet, J.C. Joubert, A. Isalgué: J. Magn. Magn. Mater.44, 118 (1984)Google Scholar
  29. 29.
    X. Obradors, A. Isalgué, A. Collomb, M. Pernet, J. Tejada, J.C. Joubert: Adv. in Ceramics15 (in press)Google Scholar
  30. 30.
    N. Fuchikami: J. Phys. Soc. Jpn.20, 760 (1965)Google Scholar
  31. 31.
    G. Asti, S. Rinaldi: AIP Conf. Proc.34, 214 (1976)Google Scholar
  32. 32.
    Y. Xu, G.L. Yang, D.P. Chu, M.R. Zhai: J. Magn. Magn. Mater.31–34, 815 (1983)Google Scholar

Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • A. Isalgué
    • 1
  • A. Labarta
    • 2
  • J. Tejada
    • 2
  • X. Obradors
    • 2
  1. 1.Departament de Física, E.T.S.A.B.Universitat Politécnica de CatalunyaBarcelonaSpain
  2. 2.Facultat de FísicaUniversitat de BarcelonaBarcelonaSpain

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