Pressure measurement at high temperature using ten Sm:YAG fluorescence peaks
作者： Yuechao Zhao , William Barvosa-Carter , Steven D. Theiss , Salman Mitha , Michael J. Aziz
DOI: 10.1063/1.368693
关键词:
摘要: A high-temperature pressure calibration technique using Sm-doped Y3Al5O12 (Sm:YAG) crystal as the calibrant has been developed by studying its Y1 through Y10 fluorescence peaks (frequencies from 15 600 to 17 200 cm−1) at pressures (p) 1 bar 19 GPa and temperatures (T) 20 850 °C in externally heated diamond anvil cells. The entire spectrum was fit a sum of ten Lorentzians plus linear background. positions, relative intensities widths were represented empirical functions p T. Several fitting routines for determination created based on these dependences, tested various high-p high-T experimental Sm:YAG spectra. values obtained are compared with those ruby nitrogen (N2) vibron scales. routine is proposed that can determine within an estimated uncertainty 0.4 GPa.
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