Abstract
The competition between magnetic ordering and the Kondo effect inCe2RhSi3, ordering antiferromagnetically at 7 K, is investigated by the measurements ofmagnetization, heat capacity and electrical resistivity on the solid solutions,Ce2−xLaxRhSi3,Ce2−yYyRhSi3,and Ce2RhSi3−zGez, as well as by high-pressure studies on this compound. The trends in the Kondo and Néeltemperature variations among these alloys are compared to infer the roles of unit-cellvolume and electronic structure changes. On the basis of the results, we infer that thiscompound lies at the peak of Doniach’s magnetic phase diagram. The high-pressureelectrical resistivity data indicate that the quantum critical point for this compound is inthe vicinity of 4 GPa.
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