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Diamond as pressure sensor in high‐pressure Raman spectroscopy using sapphire and other gem anvil cells
Author(s) -
Baonza Valentín García,
Taravillo Mercedes,
Arencibia Amaya,
Cáceres Mercedes,
Núñez Javier
Publication year - 2003
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.998
Subject(s) - raman spectroscopy , diamond anvil cell , sapphire , hydrostatic pressure , diamond , analytical chemistry (journal) , high pressure , pressure sensor , ambient pressure , materials science , chemistry , optics , laser , composite material , thermodynamics , physics , chromatography
We propose a new Raman pressure scale based on the shift with pressure of the fundamental Raman band of micrometer‐sized diamonds. First, we confirmed that the pressure slope of the triply degenerate diamond phonon behaves in a similar fashion to that of the bulk. Our measurements were calibrated Raman against the Sm:YAG fluorescence pressure scale up to 5 GPa using a gasketed sapphire anvil cell. The most relevant features regarding the design of the anvil cell are briefly outlined. Measurements were performed under hydrostatic conditions using 4 : 1 methanol–ethanol as pressure‐transmitting medium. The calibration pressures according to the relationship p (GPa) = 0.356[ν(cm −1 ) − 1332.3] are considered to be accurate within about 0.1 GPa. The convenience of using micrometer‐sized diamonds as pressure sensors in Raman studies using gem anvil devices is demonstrated with several examples. Copyright © 2003 John Wiley & Sons, Ltd.