Low-frequency acoustic properties of kliso4 crystal at high temperatures
2002
Abstract The low-frequency internal friction and shear modulus of KLiSO4 crystal have been studied by an inverse torsion pendulum technique over the temperature range from 300 K to 1000 K. An anomalous behaviour of acoustic properties near 712 K and 948 K related to phase transitions was observed. A strong influence of domain dynamics on the mechanical properties near the phase transitions and in the ferroelastic phase was revealed. The influence is caused by the anisotropy of the mechanical losses as well as a dependence of the internal friction and shear modulus on the experimental conditions and the thermal history
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