Abstract
The mean-field theory based on a new high-degeneracy model is derived to describe an interplay between magnetic order, the Kondo effect and superconductivity in heavy-fermion compounds. The competetion and coexistence of the Kondo effect and ferro- and antiferromagnetic orders of localized moments are considered in detail. It is shown that an antiferromagnetic order arising in the coherent Kondo state has an anomalously small antiferromagnetic moment per f-atom (∼10 -2μ B) and stimulates superconductivity with an anistropic superconducting gap which vanishes along lines on the Fermi surface.
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