Non-Fermi-Liquid State in URu_{0.68}Pd_{0.32}Ge

• Authors: V. Tran , D. Gralak
• Languages of publication: EN

Abstracts

EN

We report the measurements of dc-magnetization (M), specific heat (C_{p}) and electrical resistivity (ρ) of an intermetallic URu_{0.68}Pd_{0.32}Ge, that lies at the border between nonmagnetic and magnetic regimes in the magnetic phase diagram of solid solutions URu_{1-x}Pd_{x}Ge. The studied composition shows enhanced dc-magnetic susceptibility χ(T) and the Sommerfeld ratio C_{p}(T)/T at low temperatures. Below 4 K χ(T), C_{p}(T)/T and ρ(T) can be described by χ(T) ∝ T^{-0.48}, C_{p}(T)/T ∝ √T and ρ(T) ∝ c ln(T)+AT^{3/2}, respectively. These observations provide an evidence that URu_{0.68}Pd_{0.32}Ge 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.

Keywords

EN

71.27.+a; 75.30.Mb; 75.40.Cx; 75.45.+j

Discipline

• 75.45.+j: Macroscopic quantum phenomena in magnetic systems
• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 75.40.Cx: Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
• 75.30.Mb: Valence fluctuation, Kondo lattice, and heavy-fermion phenomena(see also 71.27.+a Strongly correlated electron systems, heavy fermions; for heavy-fermion superconductors, see 74.70.Tx)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 312-314

Dates

published

2015-02

Contributors

author

V. Tran

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wrocław, Poland

author

D. Gralak

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wrocław, Poland

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Identifiers

DOI

10.12693/APhysPolA.127.312