Tunable thermal expansion behavior in the intermetallic YbGaGe

F. R. Drymiotis, Y. Lee, G. Lawes, J. C. Lashley, T. Kimura, S. M. Shapiro, A. Migliori, V. Correa, R. A. Fisher

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Abstract

We investigate the effects of carbon and boron doping on the thermal expansion of the hexagonal (P 63 mmc) intermetallic YbGaGe. X-ray powder diffraction was used to measure the lattice constants on pure and doped (C or B at nominal levels of 0.5%) samples from T∼10 K to T∼300 K. Also measured were resistivity, specific heat, and magnetic susceptibility. While the pure YbGaGe samples exhibit positive thermal volume expansion, (V300 K - V10 K). V300 K =0.94, the volume expansion in the lightly C- or B-doped samples changes slope and tends toward zero-volume expansion. Such a strong response to light doping suggests that the underlying mechanism for the reported zero-volume expansion is substitutional disorder, and not the previously proposed valence fluctuations.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number17
DOIs
Publication statusPublished - 2005 Dec 1

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Drymiotis, F. R., Lee, Y., Lawes, G., Lashley, J. C., Kimura, T., Shapiro, S. M., Migliori, A., Correa, V., & Fisher, R. A. (2005). Tunable thermal expansion behavior in the intermetallic YbGaGe. Physical Review B - Condensed Matter and Materials Physics, 71(17). https://doi.org/10.1103/PhysRevB.71.174304