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 language | English |
|---|---|
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 71 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - 2005 Dec 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Tunable thermal expansion behavior in the intermetallic YbGaGe. / Drymiotis, F. R.; Lee, Yongjae; Lawes, G.; Lashley, J. C.; Kimura, T.; Shapiro, S. M.; Migliori, A.; Correa, V.; Fisher, R. A.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 71, No. 17, 01.12.2005.Research output: Contribution to journal › Article
TY - JOUR
T1 - Tunable thermal expansion behavior in the intermetallic YbGaGe
AU - Drymiotis, F. R.
AU - Lee, Yongjae
AU - Lawes, G.
AU - Lashley, J. C.
AU - Kimura, T.
AU - Shapiro, S. M.
AU - Migliori, A.
AU - Correa, V.
AU - Fisher, R. A.
PY - 2005/12/1
Y1 - 2005/12/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.71.174304
DO - 10.1103/PhysRevB.71.174304
M3 - Article
VL - 71
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 17
ER -