Weak coupling magnetism in Ce4Pt12Sn25: A small exchange limit in the Doniach phase diagram

Han Oh Lee, Nobuyuki Kurita, Pei Chun Ho, Cathie L. Condron, Peter Klavins, Susan M. Kauzlarich, M. B. Maple, R. Movshovich, E. D. Bauer, J. D. Thompson, Z. Fisk

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Magnetic susceptibility, magnetization, specific heat, and electrical resistivity studies on single crystals of Ce4Pt12Sn 25 reveal an antiferromagnetic transition at TN = 0.19K, which develops from a paramagnetic state with a very large specific heat coefficient (C/T) of 14Jmol-1K-2-Ce just above T N. On the basis of its crystal structure and these measurements, we argue that a weak magnetic exchange interaction in Ce4Pt 12Sn25 is responsible for its low ordering temperature and a negligible Kondo-derived contribution to physical properties above T N. The anomalous enhancement of specific heat above TN is suggested to be related, in part, to weak geometric frustration of f-moments in this compound.

Original languageEnglish (US)
Article number065601
JournalJournal of Physics Condensed Matter
Volume22
Issue number6
DOIs
StatePublished - 2010

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)

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    Lee, H. O., Kurita, N., Ho, P. C., Condron, C. L., Klavins, P., Kauzlarich, S. M., Maple, M. B., Movshovich, R., Bauer, E. D., Thompson, J. D., & Fisk, Z. (2010). Weak coupling magnetism in Ce4Pt12Sn25: A small exchange limit in the Doniach phase diagram. Journal of Physics Condensed Matter, 22(6), [065601]. https://doi.org/10.1088/0953-8984/22/6/065601