Explanation

The structural transformation that occurs when ferroelectric body pass through their curie point during cooling or heating. The materials that shows polarization under the action of no external electric field and whose polarization vector can be reversed by changing the external electric field is called ferroelectric body. Ferroelectric phase transformation is a soft mode phase transformation. The structural state (ferroelectric phase) caused by the spontaneous displacement of atoms is a vibration mode in the non ferroelectric phase (parent phase). At the curie point, the frequency of this vibration mode becomes abnormally low or tends to zero, and the ferroelectric phase i replaces the non iron phase.

Classification