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Ferroelectric

Physics: Pyroelectricity , Condensed matter physics , Spintronics , Ceramics
People: Oliver Heaviside
Lists: Examples of electrical phenomena , List of physics topics , List of electronics topics

In physics, the ferroelectric effect is an electrical phenomenon whereby certain crystals may exhibit a spontaneous dipole moment (which is called ferroelectric by analogy with ferromagnetic - exhibiting a permanent magnetic moment). The effect in the most typical case, barium titanate, is due to a polarization catastrophe, in which the local electric fields due to the polarization itself increase faster than the elastic restoring forces on the ions in the crystal, thereby leading to an asymmetrical shift in ionic positions and hence to a permanent dipole moment. Ferroelectric crystals often show several Curie points, domain structure hysteresis, much as do ferromagnetic crystals.

This concept is related to Ferroelectricity and to Ferroelectric objects,

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Ferroelectric".