Title :
Elastic properties of SrTiO/sub 3/ under extreme conditions: a new high pressure ultrasonic measurement set-up
Author :
Lheureux, D. ; Fischer, M. ; Polian, A. ; Itie, J.P. ; Gauthier, Michael ; Syfosse, G.
Author_Institution :
Physique des Milieux Condenses, Paris, France
Abstract :
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.
Keywords :
Gruneisen coefficient; elastic constants; elastic moduli measurement; equations of state; high-pressure solid-state phase transformations; high-pressure techniques; strontium compounds; ultrasonic measurement; 0 to 6 GPa; SrTiO3; acoustic mode Gruneisen parameters; acoustic transit times; bulk modulus; cubic perovskite; cubic-tetragonal phase transition; elastic constants; elastic properties; equation of state; extreme conditions; high pressure US measurement setup; pressure dependence; Acoustic measurements; Boron; Electromagnetic wave absorption; Equations; Pressure measurement; Raman scattering; Strontium; Titanium compounds; Ultrasonic variables measurement; X-ray diffraction;
Conference_Titel :
Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE
Conference_Location :
Caesars Tahoe, NV
Print_ISBN :
0-7803-5722-1
DOI :
10.1109/ULTSYM.1999.849455
