Measurements of ultrasonic attenuation and velocity in Verneuil-grown and flux-grown SrTiO3
- 20 October 1985
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 18 (29) , 5549-5578
- https://doi.org/10.1088/0022-3719/18/29/007
Abstract
Ultrasonic attenuation and velocity have been studied above the 105K structural phase transition in SrTiO3. Two different samples, one Verneuil-grown, the other flux-grown, have been investigated. The data were analysed self-consistently to obey symmetry requirements and the Kramers-Kronig relations. Both samples possess the same power law behaviour for the measured quantities. The exponents are larger than the critical exponents predicted from renormalisation group theory. An order of magnitude difference in relaxation time amplitudes between the two samples is interpreted as being due to different impurity contents. In the flux-grown sample, first-order-like behaviour was observed.Keywords
This publication has 47 references indexed in Scilit:
- Fluctuation-induced first-order transitions and symmetry-breaking fields: The-component cubic modelPhysical Review B, 1982
- Crossover from Fluctuation-Driven Continuous Transitions to First-Order TransitionsPhysical Review Letters, 1981
- Lifshitz-Point Critical and Tricritical Behavior in Anisotropically Stressed PerovskitesPhysical Review Letters, 1979
- The surface barrier Rayleigh wave transducerJournal of Applied Physics, 1979
- Structural phase transitions in semiconducting SrTiO3Solid State Communications, 1978
- Coupled order parameters, symmetry-breaking irrelevant scaling fields, and tetracritical pointsPhysical Review B, 1975
- “Renormalized” crossover exponent for anisotropic cubic systemsPhysics Letters A, 1974
- Polycritical Points and Floplike Displacive Transitions in PerovskitesPhysical Review Letters, 1974
- Critical Attenuation of Sound by Soft Modes in SrTiPhysical Review Letters, 1969
- Elastic Constants of Strontium TitanatePhysical Review B, 1963