Ferroelastic properties of LiCsSO4 crystals

Abstract

The temperature dependence of dielectric permittivities, shear moduli and internal friction of LiCsSO4 crystals were measured. Large anomalies were found in G1 and G2 shear moduli and in the internal friction Q-1 for the samples in a and b directions, near the Curie point Tc = 202 K. The temperature dependence of stress-strain hysteresis loops was also studied. In the samples cut out along the a direction a single loop was found while in the b direction a double hysteresis loop was observed.