Abstract
The temperature dependence of the soft mode frequency and damping in BaTiO3 and SrTiO3 as obtained with a scanning infrared interferometer is reported in their cubic paraelectric phase up to 1 350 K. Although the soft mode damping in BaTiO3 is found to be 4 times higher than in SrTiO3, otherwise soft mode behaviors are similar and it seems there is no need to invoke a mechanism for the mode hardening in the former material fundamentally different from that in the second.
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