Abstract
The problem of magnetic ordering in Kondo lattices is discussed. Criteria of ferro- and antiferromagnetism in the mean-field approximation for the s−f exchange model are obtained. In the case of a constant bare DOS, the saturated Kondo ferromagnetic solution is energetically stable at small intersite interactions J. The role of spin-fluctuation corrections at low T T K is calculated. A possible picture of the formation of magnetism is presented starting from the high-T limit
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