Abstract
By pursuing the role of the exchange interaction between electrons in the screening of the ion-ion interaction in a metal, we recently showed how directly the magnetic properties of the metal are reflected on the elastic properties such as phonon frequency and sound velocity. Now we ask the opposite question: Is it necessary to consider the electron-phonon interaction (EPI) in understanding the magnetic properties of a metal? Indeed we find it essential to consider EPI; by the effect of EPI, in the paramagnetic state of an itenerant electron ferromagnet the spin susceptibility is made Curie-Weiss-like, and in the ferromagnetic state the magnetization can be reduced by as much as ∼1μ B per atom. These findings offer a comprehensive fundamental view point to discuss the relation between the elastic and magnetic properties in itinerant electron ferromagnets.
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