Elasticity, strength, and refractive index of argon at high pressures

Bin Chen*, A. E. Gleason, J. Y. Yan, K. J. Koski, Simon Clark, Raymond Jeanloz

*Corresponding author for this work

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

High-pressure Brillouin spectroscopy of polycrystalline argon, measured using two scattering angles (180° and 70°), determines the isotropic elastic moduli, shear strength, equation of state, and refractive index of face-centered-cubic argon from 1.3 to 30 GPa at room temperature. The index of refraction n=1.33-1.67 over this pressure range. An Eulerian finite-strain analysis (Birch-Murnaghan equation of state) yields an isothermal bulk modulus and pressure derivative KT =15.1 (±1.1) GPa and K′T =5.4 (±0.3) at 2 GPa. The resulting equation of state agrees well with previous x-ray diffraction measurements, illustrating the suitability of high-pressure Brillouin scattering for characterizing the elasticity and strength of polycrystalline materials.

Original languageEnglish
Article number144110
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume81
Issue number14
DOIs
Publication statusPublished - 14 Apr 2010
Externally publishedYes

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