Valence fluctuation and electron-phonon coupling in La68-xCexAl10Cu20Co2(x=0, 34, and 68) metallic glasses

M. B. Tang, J. Q. Wang, W. H. Wang, L. Xia, Kang Cheung Chan, J. T. Zhao

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We study the anomalous acoustic softening behavior in La68-xCexAl10Cu20Co2(x=0, 34, and 68) metallic glasses by magnetic susceptibility, thermal expansion, and specific heat at low temperatures. The Ce-based metallic glass exhibits valence fluctuation phenomenon, anomalous thermal expansion and acoustic Grüneisen parameter at low temperatures. And we provide experimental evidence of the existence of strong electron-phonon coupling in the Ce-based metallic glasses by specific heat. The anomalous acoustic and thermal properties are attributed to the valence instability in the metallic glasses.
Original languageEnglish
Article number033525
JournalJournal of Applied Physics
Issue number3
Publication statusPublished - 1 Aug 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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