Abstract
Band structure and the detailed form of the Fermi surface of bcc Eu metal are calculated by the KKR method by using various exchange potentials of X α-type with α=2/3, 0.8, and 0.9. Already in 1976 and 1977, we have made a similar calculation with α=1 and have concluded that the electron Fermi surface is rather sphere-like on the contrary to the conclusion of Andersen and Loucks. Now in the present calculation, we confirm the fact that the previous conclusion is still kept valid even when the exchange potential is varied. Thus, we understand that the electron Fermi surface does not make practical contribution to the “nesting” phenomenon in the helical spin ordering of this metal.
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