Possible Observation of a Compensated Spin State in the Actinide Intermetallic CompoundsUxTh1−xPd3

An EPR measurement of Gd in ${\mathrm{U}}_x{\mathrm{Th}}_{1-x}{\mathrm{Pd}}_3$, $0<x<\mathrm{}1\mathrm{}$, shows anomalous behavior as a function of temperature. These results, as well as previous anomalous susceptibility measurements of the same compounds, are taken to indicate the existence of a partially compensated spin state on the uranium in ${\mathrm{U}}_x{\mathrm{Th}}_{1-x}{\mathrm{Pd}}_3$. This work indicates the possibility of the existence of the Kondo effect in concentrated spin systems. It shows, also, that the utilization of the EPR technique is a powerful method for investigating the Kondo effect.