On the role of d-d electron correlations in the cohesion and ferromagnetism of transition metals

J. Friedel , C.M. Sayers

The role of d-d correlations in the stability of phases in transition metals is studied in a semi-quantitative way, using a second-order perturbation formula which can be related to Gutzwiller's approximation. This deviation from the Hartree-Fock approximation increases the cohesion and decreases the surface tension; it destabilizes ferromagnetism, especially for nearly-half-full d bands. The maximum effect on cohesion and surface tension occurs for a half-filled d band; it remains small, at least for the 4d and 5d series.

Mots clés: band model of magnetism; band structure of crystalline metals; ferromagnetic properties of substances; transition metals

Domaines: Articles anciens

J. Friedel, C.M. Sayers. On the role of d-d electron correlations in the cohesion and ferromagnetism of transition metals. Journal de Physique, 1977, 38 (6), pp.697-705. ⟨10.1051/jphys:01977003806069700⟩. ⟨jpa-00208629⟩