Influence of Fermi surface topology on kinetic properties of Fe-Co alloys in the domain close to an equiatom composition

B. S. Zenin, V. F. Nyavro, V. P. Fadin

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The electron energy spectrum for the superstructure FeCo is computed by a symmetrized Green's function method. A curve of the density of the electron states N(ε) and the Fermi surface (FS) section is constructed for the ferromagnetic state obtained by a rigid shift in conformity with the value of the atomic magnetic moment of the alloy. A FS scheme is proposed, consisting of definite sheets belonging to different energy bands emerging at the Fermi level. A semiquantitative estimate is made of the magnitude of the FS area, and the contribution of separate FS sheets to the magnitude of the anomalous Hall R s, Nernst-Ettingshausen Q s and thermal emf S coefficients are examined. The nature of the change in the separate FS sections as the alloy composition changes is examined within the framework of the rigid band model, and a qualitative explanation is obtained for the concentration dependence of R s and S in Fe-Co alloys.

Original languageEnglish
Pages (from-to)1065-1070
Number of pages6
JournalSoviet Physics Journal
Issue number12
Publication statusPublished - Dec 1981


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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