Non-Fermi-liquid behaviour in magnetic d- and f-electron systems

S. R. Julian, F. V. Carter, F. M. Grosche, R. K.W. Haselwimmer, S. J. Lister, N. D. Mathur, G. J. McMullan, C. Pfleiderer, S. S. Saxena, I. R. Walker, N. J.W. Wilson, G. G. Lonzarich

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A growing number of metals have been found to show systematic deviations from the predictions of Landau Fermi-liquid theory. The most straightforward examples are magnetic metals in which the Curie (TC) or Néel (TN) temperature has been suppressed to 0 K by the application of hydrostatic pressure. Such systems are discussed here within a spin fluctuation framework which provides quantitatively accurate descriptions of the d-electron systems MnSi and ZrZn2 near their 'quantum critical points', but which appears to be less successful (in its simplest form) in antiferromagnetic f-electron systems, particularly CePd2Si2, which at its critical pressure has a resistivity of the form Δρ ∝ T1.2±0.1 over a temperature range extending from around 40 K to below 1 K. CeNi2Ge2, which is believed to be close to a quantum critical point at ambient pressure, shows similar behaviour. CeIn3, CePd2Si2 and CeNi2Ge2 exhibit superconductivity, in the first two cases limited to a narrow region near the critical pressure, making these the first unambiguous examples of magnetically mediated superconductivity.

Original languageEnglish
Pages (from-to)265-270
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Issue numberPART 1
StatePublished - Jan 1998
Externally publishedYes


  • Critical phenomena - magnetic-phase transition
  • Heavy-fermion systems
  • Quantum fluctuations
  • Spin fluctuations


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