In this work we use a Schrieffer‐Wolff transformation in a two‐fold degenerate periodic Anderson lattice to describe the coexistence of Kondo effect and ferromagnetism in some uranium and neptunium compounds. We show that the inclusion of a bandwidth for the f electrons can account for a weak delocalization of 5 f electrons. Using a mean field approximation, we show that a maximum of T C versus J K can be found when the bandwidth is proportional to J K .
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Coexistence of Kondo effect and ferromagnetism in the Underscreened Kondo Lattice model
Thomas, C.; Simões, A. S. R.; Iglesias, J. R.; Lacroix, C.; Perkins, N. B.; Coqblin, B.
Follow AIP Conference Proceedings
, Volume 1419 (1)
American Institute of Physics – Dec 13, 2011
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