GROUND-STATE IN CEAL3 - A CE1-XLAXAL3 STUDY

By performing La doping on the Ce sites we have demonstrated that the heavy-fermion ground state in CeAl3 is extremely unstable toward local -moment antiferromagnetism. Profound changes in the low-temperature sp ecific heat are already seen at the 1% doping level. We believe that t his sensitivity to structural/chemical modifications is responsible fo r a large number of the mutually contradictory experimental results re ported for CeAl3. Further, we propose that the weak C/T structure obse rved for some CeAl3 samples near 0.4 K has a magnetic origin.