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dc.creatorZhao, Yuechao
dc.creatorAziz, Michael
dc.creatorBarvosa-Carter, William
dc.creatorTheiss, Steven D.
dc.creatorMitha, Salman
dc.creatorShiferl, David
dc.identifierZhao, Yuechao, William Barvosa-Carter, Steven D. Theiss, Salman Mitha, Michael J. Aziz, and David Schiferl. 1998. Pressure measurement at high temperature using ten Sm:YAG fluorescence peaks. Journal of Applied Physics 84(8): 4049-4059.
dc.descriptionA high-temperature pressure calibration technique using Sm-doped Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> (Sm:YAG) crystal as the pressure calibrant has been developed by studying its Y1 through Y10 fluorescence peaks (frequencies from 15 600 to 17 200 cm<sup>–1</sup>) at pressures (<i>p</i>) from 1 bar to 19 GPa and temperatures (<i>T</i>) from 20 to 850 °C in externally heated diamond anvil cells. The entire spectrum was fit to a sum of ten Lorentzians plus a linear background. The positions, relative intensities and widths were represented by empirical functions of <i>p</i> and <i>T</i>. Several fitting routines for <i>p</i> determination were created based on these dependences, and were tested on various high-<i>p</i> and high-<i>T</i> experimental Sm:YAG fluorescence spectra. The <i>p</i> values obtained from the fitting routines are compared with those obtained from the ruby and the nitrogen (N<sub>2</sub>) vibron pressure scales. A fitting routine is proposed that can determine <i>p</i> from 20 to 850 °C within an estimated uncertainty of 0.4 GPa.
dc.descriptionEngineering and Applied Sciences
dc.publisherAmerican Institute of Physics
dc.relationJournal of Applied Physics
dc.titlePressure Measurement at High Temperature Using Ten Sm:YAG Fluorescence Peaks

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