Phys. Rev. Lett. 93, 025502 (2004) [4 pages]Monocrystal Elastic Constants of the Negative-Thermal-Expansion Compound Zirconium Tungstate (ZrW2O8)See Also: Publisher's Note Received 26 January 2004; published 8 July 2004; corrected 22 July 2004 We measured zirconium tungstate's elastic constants Cij. This compound shows relatively soft, nearly isotropic elastic constants with normal Poisson ratios and no approach to Born instability. ZrW2O8 shows normal ambient-temperature elastic constants Cij, but remarkable dCij/dT that show dominant low-frequency acoustic-vibration modes. From the bulk modulus, we estimated the total ambient-temperature thermodynamic Grüneisen parameter as γ=-1.2. The dB/dT slope gives a Grüneisen parameter γ=-7. The 300–0 K bulk-modulus increase (40%) seems unprecedented and breaks Birch's law of corresponding states. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.025502
DOI:
10.1103/PhysRevLett.93.025502
PACS:
62.20.Dc
See AlsoPublisher's Note: F. R. Drymiotis, H. Ledbetter, J. B. Betts, T. Kimura, J. C. Lashley, A. Migliori, A. P. Ramirez, G. R. Kowach, and J. Van Duijn, Publisher's Note: Monocrystal Elastic Constants of the Negative-Thermal-Expansion Compound Zirconium Tungstate (ZrW2O8) [Phys. Rev. Lett. 93, 025502 (2004)], Phys. Rev. Lett. 93, 059903 (2004). |
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.