Zeitschrift für Physik B Condensed Matter

, Volume 70, Issue 2, pp 187–192 | Cite as

Unexpected magnetic behaviour in a singlet crystal field ground state induced by Tb 4f-instability

  • E. Braun
  • A. Bürger
  • G. Nieva
  • B. Roden
  • J. G. Sereni
Article
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Abstract

The magnetic susceptibility (χ) of Th1-xTb x alloys (with 5<x<55a/o Tb) in the range of 1 K<T<350K and the specific heat (forx=1.5a/o Tb) for 0.5<T<10 K were measured. A maximum in χ(T) was observed at a temperature which depends on concentration. The crystal field level scheme that fits the specific heat measurements shows two non-magnetic singlets as lowest levels. Such ambiguity is discussed within the framework of the 4f-Tb instability. The results are in agreement with the matrix superconductiveT c decrease. The contribution of the interconfigurational mixing on χ and the specific heat is also discussed.

Keywords

Spectroscopy Neural Network State Physics Complex System Magnetic Susceptibility 
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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • E. Braun
    • 1
  • A. Bürger
    • 1
  • G. Nieva
    • 2
  • B. Roden
    • 1
  • J. G. Sereni
    • 2
  1. 1.II. Physikalisches InstitutUniversität zu KölnKöln 41Germany
  2. 2.Centro Atomico Bariloche-CNEABarilocheArgentina

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