Kondo Lattice and Magnetic Properties in Strongly Correlated Electron Systems

• Authors: B. Coqblin
• Languages of publication: EN

Abstracts

EN

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 CeNi_xCu_{1-x} alloys.

Keywords

EN

71.27.+a; 72.15.Qm; 75.10.Nr; 75.20.Hr

Discipline

• 72.15.Qm: Scattering mechanisms and Kondo effect(see also 75.20.Hr Local moments in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions in magnetic properties and materials)
• 75.10.Nr: Spin-glass and other random models(for spin glasses and other random magnets, see 75.50.Lk)
• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 75.20.Hr: Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions(for Kondo effect and scattering mechanisms in electronic conduction, see 72.15.Qm and 72.10.Fk)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 1
• Pages: 13-17

Dates

published

2009-01

Contributors

author

B. Coqblin

• Laboratoire de Physique des Solides (UMR 8502), CNRS, Université Paris-Sud, 91405 Orsay, France

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Identifiers

DOI

10.12693/APhysPolA.115.13