Strong Secondary Piezoelectric Effect In Ferroelectric 0.7pb(Mg1/3nb2/3)O-3-0.3pbtio(3) Crystal

In this work, the secondary piezoelectric effect in the ferroelectric 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) crystal was measured and characterized. The reverse internal electric field induced by the secondary piezoelectric effect shows a good linear response to the applied external electric field over the measured frequency range of 40 Hz similar to 4 kHz. The measured secondary piezoelectric coefficient (i.e., the ratio of the induced reverse internal electric field to the applied external electric field) is 0.4. This strong secondary piezoelectric phenomenon will lower the primary piezoelectric effect and should be taken into account for accuracy in practical piezoelectric sensor/actuator applications. (C) 2013 AIP Publishing LLC.