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

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 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 language	English
Pages (from-to)	1065-1070
Number of pages	6
Journal	Soviet Physics Journal
Volume	24
Issue number	12
DOIs	https://doi.org/10.1007/BF00893724
Publication status	Published - Dec 1981

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Physics and Astronomy(all)

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10.1007/BF00893724

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

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 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.",

author = "Zenin, {B. S.} and Nyavro, {V. F.} and Fadin, {V. P.}",

year = "1981",

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doi = "10.1007/BF00893724",

language = "English",

volume = "24",

pages = "1065--1070",

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publisher = "Consultants Bureau",

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T1 - Influence of Fermi surface topology on kinetic properties of Fe-Co alloys in the domain close to an equiatom composition

AU - Zenin, B. S.

AU - Nyavro, V. F.

AU - Fadin, V. P.

PY - 1981/12

Y1 - 1981/12

N2 - 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.

AB - 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.

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

Abstract

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