Force flexoelectric

The characteristic dependences A oc and the absence of the threshold were determined experimentally [185], and the coefficient e33 = 3.7 x 10 dyn / was determined for MBBA. The sign of the flexoelectric coefficient was determined in a separate experiment, where the velocity of motion of the liquid crystal due to the force QE was recorded optically. It is essential that the space charge Q occurs as a result of the flexoelectric effect Q = —dP/dy. For MBBA, 633 was found to be positive. 

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