The S=1 Underscreened Anderson Lattice model for Uranium compounds

The S=1 Underscreened Anderson Lattice model for Uranium compounds

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 e...

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Veröffentlicht in:Journal of physics. Conference series 2011-01, Vol.273 (1), p.012028-5
Hauptverfasser: Thomas, C, Simões, A S R, Iglesias, J R, Lacroix, C, Perkins, N B, Coqblin, B
Format: Artikel
Sprache:eng
Schlagworte:
Curie temperature
Electronics
Electrons
Ferromagnetism
Kondo effect
Lattices
Magnetic properties
Mathematical models
Neptunium
Neptunium compounds
Physics
Pressure dependence
Temperature dependence
Transformations
Uranium
Uranium compounds
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Beschreibung
Zusammenfassung: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.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/273/1/012028