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 journalArticlepeer-review

    6 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

    ASJC Scopus subject areas

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

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