Frequency dispersion of longitudinal ultrasonic velocity and attenuation in [001]c-poled 0.24pb(in1/2nb1/2)o3?? 0.45pb(mg1/3nb2/3)o3-0.31pbtio3 single crystal

The frequency dispersion of ultrasonic velocity and attenuation in [001]_c-poled 0.24Pb(In_1/2Nb_1/2)O₃-0.45Pb(Mg_1/3Nb_2/3)O₃-0.31PbTiO₃ (PIN-0.45PMN-0.31PT) ternary single crystal were measured by ultrasonic spectroscopy from 25 to 100 MHz for the longitudinal wave. It was found that the velocity has a linear relationship with the frequency f, but the attenuation has a quadratic relation with f. The attenuation and frequency dispersion of the ternary system are lower than that of the (1-x)Pb(Mg_1/3Nb_2/3)O₃-xPbTiO₃ (PMN-PT) binary system and the coercive field also increased by a factor of 2.5, hence, the ternary single system is superior to the corresponding binary single-crystal system for high-frequency and high-power transducer applications.