HEAVY-FERMION, MAGNETIC AND SUPERCONDUCTING BEHAVIOR OF (CE, M)CU2SI2 - M = Y, LA, TH

초록

Ce1-xM(x)Cu2Si2 with M = Y, La, and Th have been studied via lattice constants, DC and AC magnetic susceptibility and specific heat. Y doping leads to a monotonic depression of the electronic specific-heat coefficient gamma, while La substitution causes an initial decrease of gamma-followed by an increase for x > 0.5. Antiferromagnetic order occurs for M = Th and x greater-than-or-equal-to 0.1 and a more complex type behavior is observed for x = 0.9. Magnetism and superconductivity coexist between x = 0.1 and 0.3 in Th-doped samples.

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