Kondo behaviour in Ce-Si amorphous alloys

T. Hihara, K. Sumiyama, H. Yamauchi, Y. Homma, T. Suzuki, K. Suzuki

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Incoherent Kondo effects have been observed in CexSi 100-x (x = 18, 53, 66 and 87) amorphous alloys produced by sputtering. They show large enhancement of the electronic specific-heat coefficient at low temperatures, being classified as heavy-fermion systems. The magnetic susceptibility reveals a Curie-Weiss law at T>100 K with an effective Bohr magneton number of above 2.45 mu B. However, the electrical resistivity is large, revealing a Kondo-type logarithmic temperature dependence. The atomic randomness prohibits the coherent Kondo state and the formation of a magnetically ordered state in the Ce-Si amorphous alloys.

Original languageEnglish
Article number028
Pages (from-to)8425-8436
Number of pages12
JournalJournal of Physics: Condensed Matter
Volume5
Issue number44
DOIs
Publication statusPublished - 1993 Dec 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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    Hihara, T., Sumiyama, K., Yamauchi, H., Homma, Y., Suzuki, T., & Suzuki, K. (1993). Kondo behaviour in Ce-Si amorphous alloys. Journal of Physics: Condensed Matter, 5(44), 8425-8436. [028]. https://doi.org/10.1088/0953-8984/5/44/028