重要特征：铁电体的电滞回线(hysteresis loop) OD:P, remanent polarization B E OE:Ps spontaneous polarization OF:Ec coercive field 电场E E:electric field H P:polarization amplitude 2023/6/28 图1.1铁电体的电滞回线2023/6/28 9 重要特征：铁电体的电滞回线 (hysteresis loop ) OD: Pr remanent polarization OE: Ps spontaneous polarization OF: Ec coercive field E: electric field P: polarization amplitude P