Abstract
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 Rs, Nernst-Ettingshausen Qs 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 Rs and S in Fe-Co alloys.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 3–9, December, 1981.
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Zenin, B.S., Nyavro, V.F. & Fadin, V.P. Influence of Fermi surface topology on kinetic properties of Fe-Co alloys in the domain close to an equiatom composition. Soviet Physics Journal 24, 1065–1070 (1981). https://doi.org/10.1007/BF00893724
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DOI: https://doi.org/10.1007/BF00893724