Paramagnetic Behavior of Some Rare-Earth Cobalt Compounds

In the ferrimagnetic rare-earth cobalt compounds, the reciprocal susceptibility obeys a N\'eel-type law. As a function of rare-earth content, the paramagnetic moments of cobalt atoms vary similarly with those deduced from saturation measurements. Particularly, for RCo₂ ($R=Gd,{{0ex}{0ex}}Tb,{{0ex}{0ex}}Dy,{{0ex}{0ex}}Ho,{{0ex}{0ex}}or{{0ex}{0ex}}Er$) compounds the cobalt effective moment is $(2.00±{}0.50){{μ}}B$, twice the value obtained in the ordered state.