Gigahertz ultrasonic interferometry at high P and T: New tools for obtaining a thermodynamic equation of state

S. D. Jacobsen; H. A. Spetzler; H. J. Reichmann; J. R. Smyth; S. J. Mackwell; R. J. Angel; W. A. Bassett

doi:10.1088/0953-8984/14/44/510

Gigahertz ultrasonic interferometry at high P and T: New tools for obtaining a thermodynamic equation of state

S. D. Jacobsen^*, H. A. Spetzler, H. J. Reichmann, J. R. Smyth, S. J. Mackwell, R. J. Angel, W. A. Bassett

^*Corresponding author for this work

Earth, Environmental, and Planetary Sciences

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

A new method of generating shear waves with near-optical wavelength has been developed for gigahertz ultrasonic interferometry. The new acoustic technique features a P-to-S conversion upon reflection inside an MgO buffer rod, and is used first to determine the full set of ambient P-T elastic constants (c_ij) of magnesiowüstite-(Mg, Fe)O. In addition, P-wave travel times have been measured in olivine to 250°C at ∼2.5 GPa in a resistance-heated ultrasonic diamond anvil cell, demonstrating that acoustic coupling can be maintained at high temperature in a hydrostatic (alcohol) pressure medium. The new methodology brings us closer to obtaining a complete travel-time equation of state for single-crystal samples.

Original language	English (US)
Pages (from-to)	11525-11530
Number of pages	6
Journal	Journal of Physics Condensed Matter
Volume	14
Issue number	44 SPEC ISS.
DOIs	https://doi.org/10.1088/0953-8984/14/44/510
State	Published - Nov 11 2002

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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title = "Gigahertz ultrasonic interferometry at high P and T: New tools for obtaining a thermodynamic equation of state",

abstract = "A new method of generating shear waves with near-optical wavelength has been developed for gigahertz ultrasonic interferometry. The new acoustic technique features a P-to-S conversion upon reflection inside an MgO buffer rod, and is used first to determine the full set of ambient P-T elastic constants (cij) of magnesiow{\"u}stite-(Mg, Fe)O. In addition, P-wave travel times have been measured in olivine to 250°C at ∼2.5 GPa in a resistance-heated ultrasonic diamond anvil cell, demonstrating that acoustic coupling can be maintained at high temperature in a hydrostatic (alcohol) pressure medium. The new methodology brings us closer to obtaining a complete travel-time equation of state for single-crystal samples.",

author = "Jacobsen, \{S. D.\} and Spetzler, \{H. A.\} and Reichmann, \{H. J.\} and Smyth, \{J. R.\} and Mackwell, \{S. J.\} and Angel, \{R. J.\} and Bassett, \{W. A.\}",

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T2 - New tools for obtaining a thermodynamic equation of state

AU - Jacobsen, S. D.

AU - Spetzler, H. A.

AU - Reichmann, H. J.

AU - Smyth, J. R.

AU - Mackwell, S. J.

AU - Angel, R. J.

AU - Bassett, W. A.

PY - 2002/11/11

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AB - A new method of generating shear waves with near-optical wavelength has been developed for gigahertz ultrasonic interferometry. The new acoustic technique features a P-to-S conversion upon reflection inside an MgO buffer rod, and is used first to determine the full set of ambient P-T elastic constants (cij) of magnesiowüstite-(Mg, Fe)O. In addition, P-wave travel times have been measured in olivine to 250°C at ∼2.5 GPa in a resistance-heated ultrasonic diamond anvil cell, demonstrating that acoustic coupling can be maintained at high temperature in a hydrostatic (alcohol) pressure medium. The new methodology brings us closer to obtaining a complete travel-time equation of state for single-crystal samples.

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Gigahertz ultrasonic interferometry at high P and T: New tools for obtaining a thermodynamic equation of state

Abstract

ASJC Scopus subject areas

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