Study of the piezoelectric properties of rubidium acid phthalate crystals by time-resolved three-crystal X–ray diffractometry

Using the method of time-resolved X-ray diffractometry in a three-crystal scheme, the lattice deformation of a rubidium biphthalate (С$_8$H$_5$RbO$_4$) crystal was measured in an external electric field. Under the action of an external pulsed electric field along the [001] polar direction, the piezoelectric moduli $d_{31}$, $d_{32}$, and $d_{33}$ were determined independently using three reflections 400, 070, and 004; the obtaind values are -32.8 $\pm$ 0.6, 12.8 $\pm$ 0.3, and 21.8 $\pm$ 1.2 pC/N, respectively. A good agreement was found between the values of the piezoelectric moduli obtained in this work and the values obtained earlier by the quasi-static method.