Kondo Lattice and Magnetic Properties in Strongly Correlated Electron Systems |
| B. Coqblin
Laboratoire de Physique des Solides (UMR 8502), CNRS, Université Paris-Sud, 91405 Orsay, France |
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| We review here the magnetic properties of some strongly correlated electron systems and especially cerium and uranium compounds. The normal Kondo lattice model with a localized S=1/2 spin can account for the Kondo-magnetism competition observed in cerium or ytterbium systems, while the underscreened Kondo lattice model with a localized S=1 spin can well account for the ferromagnetism - Kondo coexistence observed in some uranium compounds such as UTe. Then, we discuss the spin glass-Kondo competition and present the resulting phase diagrams showing spin glass, Kondo and magnetically ordered phases observed in disordered heavy fermion cerium alloys such as CeNixCu1-x alloys. |
| DOI: 10.12693/APhysPolA.115.13 PACS numbers: 71.27.+a, 72.15.Qm, 75.10.Nr, 75.20.Hr |