Electrostriction
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In electromagnetism, electrostriction is a property of all electrical non-conductors or dielectrics. Electrostriction causes these materials to change their shape under the application of an electric field. It is the dual property to magnetostriction.
In electromagnetism, electrostriction is a property of all electrical non-conductors or dielectrics. Electrostriction causes these materials to change their shape under the application of an electric field. It is the dual property to magnetostriction. \varepsilon_{ij} = Q_{ijkl}P_k P_l. The electrostrictive tensor satisfies Q_{ijkl} = \frac{1}{2}\frac{\partial^2\varepsilon_{ij}}{\partial P_k \partial P_l}. The related piezoelectric effect occurs only in a particular class of dielectrics. Electrostriction applies to all crystal symmetries, while the piezoelectric effect only applies to the 20 piezoelectric point groups. Piezoelectricity is equivalent to the electrostrictive displacement of ions in ferroelectric materials. Electrostriction is a quadratic effect, unlike piezoelectricity, which is a linear effect.
References
Further reading
"Electrostriction." Encyclopædia Britannica. Mini dictionary of physics (1988) Oxford University Press "Electronic Materials" by Prof. Dr. Helmut Föll
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