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Part of the resonance spectra obtained on CSBN-22 single crystal using RUS. The ferroelectric phase-transition (4 mm ↔ 4/mmm) temperature T C can be easily seen at ∼ 496 K (223 °C).
Temperature-induced strains along and perpendicular to a 3, showing clearly the Burns temperature (T B), the characteristic temperature (T*), and the Curie temperature (T C).
(a) Temperature evolutions of the elastic constants cij in GPa in the paraelectric phase, (b) a direct comparison of longitudinal elastic stiffnesses (c 11 and c 33) of CSBN-22 with that of CBN-28 and SBN-61 (see Ref. 23 ).
Temperature evolutions of the isotropic bulk modulus (B), and Poisson's ratio ( ) above Curie temperature. Deviations from Cauchy relations (gij ) are plotted in inset, showing a considerable difference in the values of Band gij .
Elastic constants cij (unit GPa) of CSBN-22 at selected temperatures (unit K). Uncertainties of the last decimal are in parenthesis.
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