Experimental g′ and g Values of Fe, Co, Ni, and Their Alloys

The magnetomechanical ratio $\mathrm{g\prime }$ and the spectroscopic factor $g$ were measured on same samples of iron and nickel. The $g$ factors were also measured for some Fe-Ni, Fe-Co, Co-Ni, alloys. The experimental values of $g$ and $\mathrm{g\prime }$ are used to check the Kittel-Van Vleck relations, whose exact form $\text{1/g+1/g′\hspace{0.17em}=\hspace{0.17em}1}$ appears well satisfied. It is shown that the effective magnetomechanical ratio $g_{\mathrm{eff}}\prime$ of an alloy, which is given by the quotient of the total magnetic moment to the total angular momentum of the system, converts itself by means of the relation $\text{1/g+l/g′\hspace{0.17em}=\hspace{0.17em}1}$ to the formula of Tsuya and Wangsness, which gives the effective splitting factor $g_{\mathrm{eff}}$ of a two-sublattice system. The calculated curves of $g_{\mathrm{eff}}$ agree with the experimental points for the Fe-Ni, Fe-Co, Co-Ni alloys. Using the measured values of $g$ and $\mathrm{g\prime }$ , one calculates the mean spin moment contribution of the ferromagnetics, with a mean electronic number higher than 26.8, which crystallize in fcc or hexagonal structures: the mean spin moment decreases linearly by increasing electronic number with a slope of ${\text{−1.05}}_{\mathrm{\mu B}}/\mathrm{electron}$ .