Abstract
The adiabatic elastic moduli of hexagonal close-packed lutetium single crystals have been determined by the ultrasonic pulse superposition technique over the temperature range 4.2–300°K. The values at 300°K in units of 1011 dyn/cm2 are C11=8.62, C33=8.09, C44=2.68, C66=2.71, and C13=2.8; the values extrapolated to 0°K are C11=9.10, C33=8.40, C44=2.91, C66=2.96, and C13=2.9. The Debye temperature calculated using the elastic moduli at 0°K is 184.5°K. The bulk elastic properties have also been calculated and they agree favorably with previously predicted polycrystalline values. The linear thermal-expansion coefficients of the lutetium single crystals have been determined over the same temperature range by using a linear-variable-differential-transformer dilatometer. The room-temperature coefficients of thermal expansion are α∥=2.0×10−6 and α⊥=4.82×10−6°K−1. A maximum in α⊥ was found at 130°K, which apparently correlates with the maximum found in the γ⊥/γ∥ ratio at 130°K, where γ is the Grüneisen constant.
References
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Dates
| Type | When |
|---|---|
| Created | 21 years, 6 months ago (Feb. 9, 2004, 1:09 p.m.) |
| Deposited | 1 year, 6 months ago (Feb. 1, 2024, 10:23 p.m.) |
| Indexed | 1 year, 6 months ago (Feb. 5, 2024, 12:29 a.m.) |
| Issued | 54 years ago (Aug. 1, 1971) |
| Published | 54 years ago (Aug. 1, 1971) |
| Published Print | 54 years ago (Aug. 1, 1971) |
@article{Tonnies_1971, title={Elastic Moduli and Thermal Expansion of Lutetium Single Crystals from 4.2 to 300°K}, volume={42}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1660725}, DOI={10.1063/1.1660725}, number={9}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Tonnies, J. J. and Gschneidner, K. A. and Spedding, F. H.}, year={1971}, month=aug, pages={3275–3283} }