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Abstract
The temperature dependences of the dielectric characteristics of Sr0.61Ba0.39Nb2 − xO6: Crx3+ single crystals with x = 0.0, 0.005, and 0.010 are investigated in the low-frequency and infrared ranges. It is revealed that the behavior of the dielectric response exhibits specific features in the vicinity of the transition from the ferroelectric phase to the paraelectric phase and in the low-temperature range. The measurements are performed along the [001] (polar axis) and [100] directions. The temperature dependences of the relative sound velocity and the attenuation of elastic waves are also studied, and the temperature ranges of the anomalous behavior of these parameters are determined. The specific features revealed in the behavior of the dielectric and acoustic properties are considered from the viewpoint of the structural transformations occurring in the SBN system upon doping with a chromium impurity.
Published Version
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