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Open AccessArticle

Picosecond Acoustics Technique to Measure the Sound Velocities of Fe-Si Alloys and Si Single-Crystals at High Pressure

Institut de Minéralogie de Physique des Matériaux et de Cosmochimie, Sorbonne Université— CNRS—Muséum National d’Histoire Naturelle, 4 Place Jussieu, F-75005 Paris, France
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Author to whom correspondence should be addressed.
Current address: Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China.
Minerals 2020, 10(3), 214; https://doi.org/10.3390/min10030214
Received: 23 January 2020 / Revised: 18 February 2020 / Accepted: 19 February 2020 / Published: 27 February 2020
(This article belongs to the Special Issue Mineral Physics—In Memory of Orson Anderson)
We describe here a time resolved pump-probe laser technique—picosecond interferometry—which has been combined with diamond anvil cells (DAC). This method enables the measurement of the longitudinal sound velocity up to Mbar pressure for any kind of material (solids, liquids, metals, insulators). We also provide a description of picosecond acoustics data analysis in order to determine the complete set of elastic constants for single crystals. To illustrate such capabilities, results are given on the pressure dependence of the acoustic properties for prototypical cases: polycrystal (hcp-Fe-5 wt% Si up to 115 GPa) and single-crystal (Si up to 10 GPa). View Full-Text
Keywords: picosecond acoustics; high pressure; sound velocity; elastic constant; iron alloys; silicon picosecond acoustics; high pressure; sound velocity; elastic constant; iron alloys; silicon
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Edmund, E.; Gauthier, M.; Antonangeli, D.; Ayrinhac, S.; Boccato, S.; Deletang, T.; Morand, M.; Garino, Y.; Parisiades, P.; Decremps, F. Picosecond Acoustics Technique to Measure the Sound Velocities of Fe-Si Alloys and Si Single-Crystals at High Pressure. Minerals 2020, 10, 214.

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