Abstract
The elastic moduli C11 and C33 of KTiOPO4 crystals unirradiated and irradiated by electrons and gamma quanta in the temperature range 100–330 K have been measured by the echo-pulse technique. It has been shown that C11 < C33 and, with increasing temperature, their values smoothly decrease; moreover, in the temperature range of the second-order phase transition at T ∼ 281 K, the curves C11 = f(T) and C33 = f(T) exhibit anomalies in the form of a kink. It has been established that, under electron irradiation, the elastic moduli decrease and the phase transition temperature increases. Irradiation of KTiOPO4 crystals by gamma quanta with a dose of 107 R has no substantial effect on the dynamic characteristics of this crystal.
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