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

doi:10.1088/1742-6596/273/1/012028

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

Physics and Astronomy (Twin Cities)

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Abstract

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 language	English (US)
Article number	012028
Journal	Journal of Physics: Conference Series
Volume	273
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/273/1/012028
State	Published - 2011

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10.1088/1742-6596/273/1/012028

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abstract = "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.",

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T1 - The S=1 underscreened anderson lattice model for uranium compounds

AU - Thomas, C.

AU - Simões, A. S.R.

AU - Iglesias, J. R.

AU - Lacroix, C.

AU - Perkins, N. B.

AU - Coqblin, B.

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

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The S=1 underscreened anderson lattice model for uranium compounds

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