Competition between Kondo effect and magnetic ordering in La<SUB>x</SUB>Ce<SUB>1−x</SUB>Pd<SUB>2</SUB>Si<SUB>2</SUB>

The results of magnetic susceptibility, resistivity and specific heat measurements on Ce<SUB>1&#8722;x</SUB>La<SUB>x</SUB>Pd<SUB>2</SUB>Si<SUB>2</SUB> show that the magnetic ordering temperature (T<SUB>N</SUB>) decreases with increasing x similar to the behaviour known for the corresponding Y substituted system. This suggests that the compound CePd<SUB>2</SUB>Si<SUB>2</SUB> lies at the peak in Doniach's magnetic phase diagram. This result places the interpretations of recent quasi-elastic linewidth measurements in the competition between magnetism and Kondo effect on a firm footing. Linear variation of T<SUB>N</SUB> with x also suggests that the direct 4f-4f interaction plays an insignificant role in the breakdown of the de Gennes scaling