Surface Effects in Amorphous Ferromagnets with Random Anisotropy

  • R. Micnas
  • A. R. Ferchmin
  • S. Krompiewski
  • B. Szczepaniak


Considerable attention is being given at present to the surface problem of magnetics. In this paper we would like to discuss how surfaces influence the properties of amorphous magnetics [1,2]. To this aim, we have selected, from the various available models of amorphous magnetics [1,2,3,4], two interrelated models [3,4] stressing the role of random local magnetic anisotropy in these materials. Accordingly, we adopt a Hamiltonian consisting of an exchange term and an anisotropic term:
$$ {\text{H}}\;{\text{ = - }}\sum\limits_{\text{i}} {{{\text{V}}_{\text{i}}}\; - } \;\sum\limits_{\text{i}} {} \sum\limits_{\text{j}} {} \;{{\text{K}}_{\text{i}}}_{\text{j}}{{\text{J}}_{\text{i}}}{{\text{J}}_{\text{j}}} $$
Specifically, the direction of the anisotropy varies randomly in the Harris-Plischke-Zuchermann (HPZ) model [3]. In the related model [4] proposed by Taggart, Tahir-Kheli and Shiles (TTS), it is the value of the anisotropy Di which is subject to random variation.


Curie Temperature Free Boundary Surface Magnetism Local Anisotropy Anisotropic Term 
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Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • R. Micnas
    • 1
  • A. R. Ferchmin
    • 2
  • S. Krompiewski
    • 2
  • B. Szczepaniak
    • 1
  1. 1.Institute of PhysicsA. Mickiewicz UniversityPoznanPoland
  2. 2.Institute of Molecular Physics, Ferromagnetics LaboratoryPolish Academy of SciencesPoznanPoland

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