Investigation of hyperfine interactions in CeIn3 by TDPAC

Magnetic hyperfine fields (mhf) at Cd-111 and Ce-140 nuclei, dilutely subst ituting the In and Ce sites, respectively, have been measured in the interm etallic compound CeIn3 using perturbed angular correlation technique. A pur e electric quadrupole interaction with an axially symmetric electric field gradient was observed at In-111(EC) Cd-111 probe nuclei at room temperature while a combined magnetic dipole and electric quadrupole interaction is ob served below 10 K. Below the ordering temperature, only a magnetic interact ion is observed at La-140(beta (-)) Ce-140 probe. The values of mhf measure d experimentally as a function of temperature are discussed in terms of cri tical behavior.