Diamond as a high pressure gauge up to 2.7 Mbar

Natalia Dubrovinskaia (1, 2) , Leonid Dubrovinsky (3) , Razvan Caracas (4) , Michael Hanfland (5)

1 Materialphysik und Technologie, Lehrstuhl für Kristallographie, Physikalisches Institut
2 Institut für Mineralogie
3 Bayerisches Geoinstitut - Bavarian Research Institute of Experimental Geochemistry and Geophysics
4 LGL-TPE - Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement
5 ESRF - European Synchrotron Radiation Facility

A pressure gauge is a key issue of any high pressure experiment in a diamond anvil cell (DAC). Here we present a method of in situ synthesis of microcrystals of diamond that can be further used as a pressure standard in the course of the same DAC experiment. Calibration curve of the Raman shift versus pressure is extended up to 270 GPa and experimental results are compared with those of ab initio calculations.

Keywords: ST-ORDER RAMAN MODE; MULTIMEGABAR PRESSURES; ANVILS; GPA; DEPENDENCE; SPECTRA; SCALE

Domains: Earth Sciences

Natalia Dubrovinskaia, Leonid Dubrovinsky, Razvan Caracas, Michael Hanfland. Diamond as a high pressure gauge up to 2.7 Mbar. Applied Physics Letters, 2010, 97 (25), pp.251903. ⟨10.1063/1.3529454⟩. ⟨insu-00676861⟩