Some physical properties of single crystals of normal and deuterated rubidium dihydrogen arsenate I. Piezoelectric and elastic properties

Abstract

The elastic and piezoelectric constants of single crystals of rubidium dihydrogen arsenate grown in H2O, and of rubidium dideuterium arsenate grown in D2O, have been measured in the temperature range 20-80°C. The shear elastic constants S44 and S66 and the extensional elastic constants S11 and S33 increase slightly on deuteration while their temperature coefficients decrease slightly. The piezoelectric constants d14 and d36 increase by 48% and 61% respectively on deuteration at 25°C. For normal RbDA the elastic constants measured at 25°C are: S11 = 22·8 × 10−12 m2 N−1, S12 = 8·5 × 10−12 m2 N−1 S13 = −1·8 × 10−12 m2 N−1, S33 = 25·4 × 10−12 m2 N−1 S44 = 96·0 × 10−12 m2 N−1, S66 = 232·0 × 10−12 m2 N−1. The piezoelectric constants are d14 = 9·9 × 10−12 C N−1 and d36 = 28·5 × 10−12 C N−1.