The S=1 underscreened anderson lattice model for uranium compounds

C. Thomas, A. S.R. Simões, J. R. Iglesias, C. Lacroix, N. B. Perkins, B. Coqblin

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Magnetic properties of uranium and neptunium compounds showing coexistence of the Kondo effect and ferromagnetic order are investigated within the degenerate Anderson Lattice Hamiltonian, describing a 5f2 electronic configuration with S = 1 spins. Through the Schrieffer-Wolff transformation, both an exchange Kondo interaction for the S = 1 f-spins and an effective f-band term are obtained, allowing to describe the coexistence of Kondo effect and ferromagnetic ordering and a weak delocalization of the 5f-electrons. We calculate the Kondo and Curie temperatures and we can account for the pressure dependence of the Curie temperature of UTe.

Original languageEnglish (US)
Article number012028
JournalJournal of Physics: Conference Series
Issue number1
StatePublished - 2011


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