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The European Physical Journal B

, Volume 63, Issue 2, pp 187–192 | Cite as

Phase transition in YbAl3C3

  • S. K. Dhar
  • P. Manfrinetti
  • M. L. Fornasini
  • P. BonvilleEmail author
Solids and Liquids

Abstract.

170Yb Mössbauer spectroscopy, temperature dependent X-ray, magnetisation and specific heat data are presented in the hexagonal intermetallic YbAl3C3, in order to shed light on the isostructural transition occurring near 80 K and to investigate the electronic state of the Yb ion above and below the transition. In the low temperature phase, we find that there occurs an atomic rearrangement in the hexagonal unit cell, leading to a strong symmetry lowering at the Yb site. We show that no magnetic ordering of the Yb3+ moments occurs down to 0.04 K, and we discuss this finding in terms of 4f-conduction electron hybridisation and geometric frustration.

PACS.

71.27.+a Strongly correlated electron systems; heavy fermions 76.80.+y Mossbauer effect; other gamma-ray spectroscopy 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Authors and Affiliations

  • S. K. Dhar
    • 1
  • P. Manfrinetti
    • 2
  • M. L. Fornasini
    • 2
  • P. Bonville
    • 3
    Email author
  1. 1.Tata Institute of Fundamental ResearchMumbaiIndia
  2. 2.INFM and Dipartimento di Chimica, Universitá di GenovaGenovaItaly
  3. 3.Commissariat à l'Énergie Atomique, Centre de Saclay, DSM/SPECGif-sur-YvetteFrance

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