Dielectric constant tensor of piezoelectric gadolinium calcium oxoborate crystal, GdCa₄O(BO₃)₃, estimated from the electric impedance spectrum

Abstract

A method for obtaining the dielectric coefficients of a piezoelectric crystal from impedance spectrum measurements was proposed. The dielectric coefficients of gadolinium calcium oxoborate, GdCa 4 O(BO 3 ) 3 , were evaluated and compared with the literature data.

Piezoelectric and Elastic Properties of γ-Irradiated Gadolinium Calcium Oxoborate, GdCa4O(BO3)3, Single Crystal

“…The values of the coefficients were obtained from fitting the equivalent circuit parameters of the piezoelectric resonator to the measured impedance spectrum as described in our previous paper [17]. One can notice that after some disturbances at small doses the dielectric coefficients ε T 11 and ε T 33 hold a constant value with increasing doses.…”