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 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) |
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Pages (from-to) | 11525-11530 |
Number of pages | 6 |
Journal | Journal of Physics Condensed Matter |
Volume | 14 |
Issue number | 44 SPEC ISS. |
DOIs | |
State | Published - Nov 11 2002 |
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics