TY - JOUR
T1 - Single crystal elasticity of gold up to >20GPa
T2 - Bulk modulus anomaly and implication for a primary pressure scale
AU - Yoneda, Akira
AU - Fukui, Hiroshi
AU - Gomi, Hitoshi
AU - Kamada, Seiji
AU - Xie, Longjian
AU - Hirao, Naohisa
AU - Uchiyama, Hiroshi
AU - Tsutsui, Satoshi
AU - Baron, Alfred Q.R.
N1 - Funding Information:
This work was supported in part by a Grant-in-Aid for Scientific Research (Grant No. 15H02128 to A.Y.) from the Japan Society for the Promotion of Science. The inelastic X-ray scattering measurement was carried out on the BL35XU of SPring-8 (Proposal Nos. 2014B1290 and 2016A1058). H.F. thanks Nobuhiro Yasuda for his help in FIB processing.
Publisher Copyright:
© 2017 The Japan Society of Applied Physics.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
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U2 - 10.7567/JJAP.56.095801
DO - 10.7567/JJAP.56.095801
M3 - Article
AN - SCOPUS:85031295761
SN - 0021-4922
VL - 56
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
IS - 9
M1 - 095801
ER -