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The electrical resistivity of both polycrystalline and single crystal CeCu(2) has been studied under pressure up to 8.3 GPa for temperatures down to 24 mK. With increasing pressure, the Kondo effect develops while the magnetic ordering temperature rises, in agreement with the diagram of Doniach. Near a critical pressure P(c) = 6 GPa, which seems to coincide with a structural change, the magnetic ordering vanishes and the electrical resistivity rho(T) recovers a Fermi liquid behaviour with rho=AT{2}. The coefficient A indicates that the electronic effective masses are much heavier than at zero pressure. In a narrow pressure window around P(c), ie. near the magnetic instability of CeCu(2), the electrical resistivity measurements show an onset of superconductivity at 0.15-0.18 K. The very high initial slope of the upper critical field strongly suggests heavy fermion superconductivity.

Additional information

Authors: VARGOZ E, University of Geneva, Department of Physics (CH);LINK P, University of Geneva, Department of Physics (CH);JACCARD D, University of Geneva, Department of Physics (CH);LE BIHAN T, JRC Karlsruhe (DE);HEATHMAN S, JRC Karlsruhe (DE)
Bibliographic Reference: Article: Physica B (1996)
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