Single crystal elasticity of gold up to >20GPa: Bulk modulus anomaly and implication for a primary pressure scale

Akira Yoneda, Hiroshi Fukui, Hitoshi Gomi, Seiji Kamada, Longjian Xie, Naohisa Hirao, Hiroshi Uchiyama, Satoshi Tsutsui, Alfred Q.R. Baron

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We measured the elasticity of single crystal gold (Au) and its lattice parameters under high pressure using inelastic X-ray scattering (IXS). The elastic moduli were obtained at five pressure points between 0 and 20 GPa. The pressure variation of the bulk modulus displays anomalous behavior, being nearly constant up to >5 GPa, and then steeply increasing at higher pressure. A similar anomaly is observed in first-principles calculations. An absolute pressure scale was derived by direct numerical integration of the bulk modulus over volume change. This yields a scale that gives slightly lower pressure values than those of previous work, about 5-10% lower at >20 GPa.

Original languageEnglish
Article number095801
JournalJapanese Journal of Applied Physics
Volume56
Issue number9
DOIs
Publication statusPublished - 2017

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bulk modulus
Elasticity
elastic properties
Gold
Elastic moduli
Single crystals
anomalies
gold
single crystals
numerical integration
lattice parameters
modulus of elasticity
low pressure
Inelastic scattering
X ray scattering
scattering
Lattice constants
x rays

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Single crystal elasticity of gold up to >20GPa : Bulk modulus anomaly and implication for a primary pressure scale. / Yoneda, Akira; Fukui, Hiroshi; Gomi, Hitoshi; Kamada, Seiji; Xie, Longjian; Hirao, Naohisa; Uchiyama, Hiroshi; Tsutsui, Satoshi; Baron, Alfred Q.R.

In: Japanese Journal of Applied Physics, Vol. 56, No. 9, 095801, 2017.

Research output: Contribution to journalArticle

Yoneda, Akira ; Fukui, Hiroshi ; Gomi, Hitoshi ; Kamada, Seiji ; Xie, Longjian ; Hirao, Naohisa ; Uchiyama, Hiroshi ; Tsutsui, Satoshi ; Baron, Alfred Q.R. / Single crystal elasticity of gold up to >20GPa : Bulk modulus anomaly and implication for a primary pressure scale. In: Japanese Journal of Applied Physics. 2017 ; Vol. 56, No. 9.
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