Anisotropy of Elastic Properties and a Glassy State of the KLHS Crystals in Temperature Range 12 K–300 K

This paper reports the first evidence of piezoelectric properties of K ₄ LiH ₃ (SO ₄ ) ₄ KLHS crystal in the temperature range 12 K–300 K. Moreover, the anomaly in the elastic properties of this crystal observed at about 50 K by the composite oscillator bar method has been related to a proton glassy state. The elastic properties of the crystal determined by piezoelectric measurements revealed an anisotropy and dispersion in the (110) plane.

Keywords:

• K₄LiH₃(SO₄)₄
• KLHS crystal
• piezoelectric
• piezoelectric properties
• anisotropic elastic properties
• composite oscillator measurements

Acknowledgments

This work has been supported by the Ministry of Education and Science, Grant No. 1Po3B 066 30.