Non-Fermi-Liquid State in URu0.68Pd0.32Ge
V.H. Tran and D. Gralak
Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wrocław, Poland
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We report the measurements of dc-magnetization (M), specific 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)+AT3/2, 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 effect of the magnetization and a large value of the Wilson ratio, which are consistent with the interpretation in terms of magnetic instability.

DOI: 10.12693/APhysPolA.127.312
PACS numbers: 71.27.+a, 75.30.Mb, 75.40.Cx, 75.45.+j