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

The magnetomechanical ratio g′ 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 g′ are used to check the Kittel-Van Vleck relations, whose exact form 1/g+1/g′ = 1 appears well satisfied. It is shown that the effective magnetomechanical ratio geff′ 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 1/g+l/g′ = 1 to the formula of Tsuya and Wangsness, which gives the effective splitting factor geff of a two-sublattice system. The calculated curves of geff agree with the experimental points for the Fe-Ni, Fe-Co, Co-Ni alloys. Using the measured values of g and g′, 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 −1.05μB/electron.