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Formal Results on the Susceptibility of Dilute Alloys. II. Mean‐Field Approach and Applications

par Bisch, Paulo Mascarello ;Gomes, A.A. A.A.
Référence Physica status solidi. B, Basic research, 76, 1, page (395-406)
Publication Publié, 1976

Article révisé par les pairs

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Résumé :

A mean field approach is adopted and a matrix formulation is used to obtain formal results for the susceptibility of a two band system (α, β). This general result includes the intra‐atomic Coulomb repulsions, one‐electron impurity potentials, and the change in the Coulomb interaction and inter‐band exchange at impurity site. The complete evaluation of the partial susceptibilities involves the calculation of inverse matrices, which is difficult to perform in the general case. Expressions for the self‐polarization hyperfine field, the Knight‐shift, and ESR g‐shift are obtained for transition metal like systems (s‐d bands), using previous results obtained in I. It is shown that these quantities may be evaluated in terms of phase‐shift, involving only the density of states and the parameters of the problem. Copyright © 1976 WILEY‐VCH Verlag GmbH & Co. KGaA