= Fréedericksz transition
{wiki=Fréedericksz_transition}
The Fréedericksz transition refers to a phenomenon observed in liquid crystals, particularly in systems subjected to an electric or magnetic field. It describes the change in the orientation of liquid crystal molecules when an external field is applied, leading to a change in the director configuration of the liquid crystal. In equilibrium, liquid crystal molecules are often aligned parallel to a certain direction (the director, often aligned with the surfaces of a cell).
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