Calibration of Sm:YAG as an alternate high-pressure scale
- 15 November 1990
- journal article
- letter
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 68 (10), 5357-5359
- https://doi.org/10.1063/1.347031
Abstract
The pressure‐induced wavelength shift of a laser‐excited fluorescence in samarium‐doped yttrium aluminum garnet (Sm:YAG) was compared with that of ruby to 26 GPa at room temperature. Because the fluorescence wavelength for Sm:YAG has a negligible temperature dependence, it provides a better pressure scale for diamond anvil cell applications than ruby under high‐temperature conditions. However, the overall intensity of the Sm:YAG fluorescence is less than that for ruby. A Gaussian–Lorentzian profile was chosen to analyze the fluorescence spectra. The Sm:YAG fluorescence wavelength exhibits an approximately linear pressure dependence (3.07±0.45 Å/GPa) only to 20 GPa at room temperature. A polynomial fit for all data to 26 GPa gives P(GPa)=−10 280(λ/λ0−1)2 +2085(λ/λ0−1), with a rms misfit of 0.14 GPa.Keywords
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