Thermal expansion of structure-disordered heavy-fermion Ce alloys

Yusuke Amakai, Shigeyuki Murayama, Yoshihisa Obi, Hideaki Takano, Naoki Momono, Koki Takanashi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We have measured the thermal expansion on structure-disordered (a-)Ce xY80-xMn20 alloys. The linear thermal expansion ΔL/L for all the samples shows a monotonic increase with increasing temperature. In the thermal expansion coefficient α for x ≥ 51, anomalous deviation from a conventional Debye curve was observed at low temperature and increased with increasing Ce concentration. The magnetic contribution α4f estimated from the equation α(a-Ce xY80-xMn20) - α(a-Y80Mn 20) increases with increasing the Ce concentration and exhibits a maximum in the low temperature for x ≥ 51. These behaviors in α4f are interpreted as the formation of the heavy fermion state in the structure-disordered alloys.

Original languageEnglish
Article numberSA057
Journaljournal of the physical society of japan
Issue numberSUPPL. A
Publication statusPublished - 2011 Jul


  • (Ce,Y)-Mn
  • Dense Kondo
  • Heavy fermion
  • Structure-disordered alloy
  • Thermal expansion

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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