抄録
Magnetic properties of Cr–Fe alloy are studied on the basis of the two band model. It is assumed that the localized moment of Fe has the role of the scattering center and the role which enhances the magnetostrictive effect; The scattering effects of the intra- and the interband processes with the Coulomb and the s-d interactions are investigated in detail. The magnetostrictive effect is enhanced by the process in which electrons flow from the localized moment to the conduction band with the volume change. The phenomenological consideration shows that the magnetostrictive effect is equivalent to the negative electron reservoir. The phase diagram, the wave number of the spin density wave and the jump in the thermal expansion at the Néel temperature are calculated in satisfactory agreement with experiments.
