Representative D-V Curve (IMAGE) Science China Press Caption This is a representative D-V curve and the piezoresponse hysteresis loop of Zn0.975V0.025O films. Credit ©Science China Press Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.