Using ultrasonic spectroscopy, the frequency dispersion of ultrasonic velocity and attenuation in the frequency range of 50-110 MHz were measured for longitudinal waves propagating in 0.68Pb (Mg13 Nb23) O3 -0.32PbTi O3 (PMN-32%PT) single crystals poled along  and , respectively. The measured dispersion of longitudinal wave velocity and attenuation in the multidomain PMN-32%PT crystals are smaller than that of PZT-4 but much higher than that of PMN-28%PT poled along . The correlation between larger piezoelectric coefficient and higher attenuation of ultrasonic waves in multiple-domain (1-x) Pb (Mg13 Nb23) O3 -xPbTi O3 single crystal for compositions closer to the morphotropic phase boundary indicates that the physical origin of the higher piezoelectric activity is associated with higher density of non-180° domain walls.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)