On the role of d-d electron correlations in the cohesion and ferromagnetism of transition metalsReport as inadecuate




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Abstract : 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.

Keywords : band model of magnetism band structure of crystalline metals ferromagnetic properties of substances transition metals





Author: J. Friedel C.M. Sayers

Source: https://hal.archives-ouvertes.fr/



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