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Abstract
The Curie temperatures of magnetic 3d elements and yttrium intermetallics are investigated. Using densities of states obtained by self-consistent LMTO band-structure calculations, it is shown that the Curie temperatures in strong and nearly strong ferromagnets cannot be understood in terms of extensions of the theory of very weak itinerant ferromagnetism such as the Mohn-Wohlfarth approach. In particular, a knowledge of the partial densities of states D up arrow (EF) and D down arrow (EF) around the Fermi level is not sufficient to deduce the Curie temperature. Reasons for this are the non-analytic character of the density of states and k-space delocalization of the thermal excitations.
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