The positive correlation of the strain hysteresis of textured PMN-24%PT ceramics with domain wall damping

High strain hysteresis is a stumbling block for the application of piezoelectric ceramics. This research affords a new insight into the origin of the ultra-low strain hysteresis of textured 76%Pb(Mg1/3Nb2/3)O3-24%PbTiO3 ceramics (PMN-24%PT). Highly textured PMN-24%PT ceramic system with some doping was successfully fabricated. This system shows unipolar strain curve approximately matching a straight line. The maximum hysteresis falls in 7%-11%. Compared to other representative piezoceramic system, current PMN-24%PT textured ceramics possess the least strain hysteresis. In addition, Mn2+ substitution for Nb5+ can inhibit domain wall mobility. The positive correlation between the ultra-low strain hysteresis and the domain wall damping is demonstrated by experiment and finite element simulation. In a conclusion, this work can enhance the understanding of strain hysteresis and contribute to high-precision piezoelectric actuators.

Automated summary

This research provides a new understanding of the origin of ultra-low strain hysteresis in 76%Pb(Mg1/3Nb2/3)O3-24%PbTiO3 ceramics. Highly textured ceramics with some doping were successfully fabricated, showing a unipolar strain curve that approximately matches a straight line. The maximum hysteresis falls within 7%-11%. Mn2+ substitution for Nb5+ inhibits domain wall mobility, demonstrating a positive correlation between ultra-low strain hysteresis and domain wall damping. This work enhances the understanding of strain hysteresis and contributes to high-precision piezoelectric actuators.