This property is known as electrostriction or inverse piezoelectricity. This characteristic is called electrostriction or inverse piezoelectricity. Relaxor ferroelectrics are ferroelectric materials that exhibit high electrostriction. Similarly, magnetostriction and electrostriction are analogous second-order effects. This phenomenon is known as electrostriction, or the reverse piezoelectric effect. Electrostriction is a quadratic effect, unlike piezoelectricity, which is a linear effect.