Crossover to Fermi-liquid behavior at lowest temperatures in pure CeNi sub(2)Ge sub(2)

We present a low temperature study of the nearly antiferromagnetic heavy Fermion compound CeNi sub(2)Ge sub(2) including specific heat measurements in magnetic fields up to 13 T, resistivity, magnetization, DC- and AC- susceptibility measurements down to 30 mK. The results show that, although the sy...

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Published inJournal of low temperature physics Vol. 119; no. 1; pp. 147 - 153
Main Authors Koerner, S, Scheidt, E-W, Schreiner, T, Heuser, K, Stewart, G R
Format Journal Article
LanguageEnglish
Published 01.01.2000
Subjects
Antiferromagnetic materials
Fermi level
Heat resistance
Low temperature effects
Magnetic field effects
Magnetic susceptibility
Magnetization
Specific heat of liquids
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Summary:We present a low temperature study of the nearly antiferromagnetic heavy Fermion compound CeNi sub(2)Ge sub(2) including specific heat measurements in magnetic fields up to 13 T, resistivity, magnetization, DC- and AC- susceptibility measurements down to 30 mK. The results show that, although the system is close to a quantum critical point, CeNi sub(2)Ge sub(2) exhibits Fermi-liquid behavior below approximately 300 mK. At higher temperatures hyperscaling indicates the existence of strong coupling spin fluctuations responsible for the observed non-Fermi-liquid properties.
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ISSN:0022-2291