Pressure calibration of diamond anvil Raman gauge to 310 GPa

Journal Article · Tue Aug 15 00:00:00 EDT 2006 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2335683· OSTI ID:20880014

Akahama, Yuichi; Kawamura, Haruki ^[1]

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1. Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigohri, Hyogo 678-1297 (Japan)

In order to develop an optical method for pressure determination in the multimegabar region, the first-order Raman spectra of diamond anvils were investigated at pressures up to 310 GPa. The high-frequency edge of the Raman band, which corresponds to the Raman shift of the anvil culet due to the normal stress, was calibrated against the sample pressure derived from the equation of state of Pt. The obtained pressure dependence of the edge frequency demonstrates the reliability of this diamond anvil Raman gauge. Up to the maximum pressure of this study, the relation between Raman frequency and normal stress at the diamond anvil culet is formally similar to the equation of state of a hydrostatically compressed isotropic elastic body having a bulk modulus of K{sub 0}=547(11) GPa and a pressure derivative of the bulk modulus K{sub 0}{sup '}=3.75(20)

• OSTI ID: 20880014
• Journal Information: Journal of Applied Physics, Vol. 100, Issue 4; Other Information: DOI: 10.1063/1.2335683; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CALIBRATION
DIAMONDS
EQUATIONS OF STATE
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
RAMAN SPECTRA
RELIABILITY
RESIDUAL STRESSES
SPECTRAL SHIFT