Elastic properties of SrTiO/sub 3/ under extreme conditions: a new high pressure ultrasonic measurement set-up

A new high pressure ultrasonic measurement set-up was used to estimate the elastic properties of strontium titanate. The pressure dependence of the three elastic constants of this cubic perovskite were deduced up to 4.5 GPa. The cubic-tetragonal phase transition occurred at 6 GPa and anomalies appea...

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Bibliographic Details
Published in1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Vol. 1; pp. 533 - 536 vol.1
Main Authors Lheureux, D., Fischer, M., Polian, A., Itie, J. P., Gauthier, M., Syfosse, G.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1999
Subjects
Acoustic measurements
Boron
Electromagnetic wave absorption
Equations
Pressure measurement
Raman scattering
Strontium
Titanium compounds
Ultrasonic variables measurement
X-ray diffraction
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Summary:A new high pressure ultrasonic measurement set-up was used to estimate the elastic properties of strontium titanate. The pressure dependence of the three elastic constants of this cubic perovskite were deduced up to 4.5 GPa. The cubic-tetragonal phase transition occurred at 6 GPa and anomalies appeared in the acoustic transit times over 4.5 GPa. The equation of state and the acoustic mode Gruneisen parameters were deduced from the acoustic data. Our results were compared to those obtained by other groups using different techniques.
ISBN:0780357221
9780780357228
ISSN:1051-0117
DOI:10.1109/ULTSYM.1999.849455