Abstract

We report the measurements of dc-magnetization (M), speci c heat (Cp) and electrical resistivity (ρ) of an intermetallic URu0.68Pd0.32Ge, that lies at the border between nonmagnetic and magnetic regimes in the magnetic phase diagram of solid solutions URu1−xPdxGe. The studied composition shows enhanced dc-magnetic susceptibility χ(T ) and the Sommerfeld ratio Cp(T )/T at low temperatures. Below 4 K χ(T ), Cp(T )/T and ρ(T ) can be described by χ(T ) ∝ T−0.48, Cp(T )/T ∝ √ T and ρ(T ) ∝ c ln(T ) +AT , respectively. These observations provide an evidence that URu0.68Pd0.32Ge is a moderately heavy-fermion system with an electronic ground state of non-Fermi liquid character. We found non-linear e ect of the magnetization and a large value of the Wilson ratio, which are consistent with the interpretation in terms of magnetic instability.

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