Convenient optical pressure gauge for multimegabar pressures calibrated to 300 GPa

• Published in: Applied physics letters Vol. 86; no. 1; pp. 014103 - 014103-3
• Main Authors: Sun, Liling, Ruoff, Arthur L., Stupian, Gary
• Format: Journal Article
• Language: English
• Published: American Institute of Physics 03-01-2005
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.1840117

The accurate measurement of pressure by a straightforward and inexpensive optical procedure has been needed in the multimegabar region since static pressures over
216
GPa
,
361
GPa
,
420
GPa
and
560
GPa
were obtained in the diamond anvil cell. Here, a simple optical pressure gauge based on the Raman shift of the diamond at the center of a diamond tip at the diamond-sample interface is calibrated against a primary gauge (Pt isotherm at
300
K
from shock data) to
300
GPa
, thus enabling researchers who do not have a synchrotron to conveniently measure pressure with an optical scale from
50
to
300
GPa
.