The multiband Hubbard model in the functional integral method; Application to nickel

Autor: Morkowski, J.A., Wosicki, P.
Zdroj: Journal of Magnetism and Magnetic Materials; February 1988, Vol. 71 Issue: 3 p285-298, 14p
Abstrakt: The method based on the Stratonovitch-Hubbard transformation is considered. Magnetic and thermodynamic properties of nickel, i.e. magnetization, the amplitude of the local magnetic moment, entropy and heat capacity as functions of temperature are studied with use of the static approximation, the alloy-analogy approximation and the single-site CPA in the functional integral method. The role of the interband exchange interaction is studied in detail. It is shown that the Curie temperature is reduced in comparison with the models without interband interactions.
Databáze: Supplemental Index