THE MAGNETIC-FIELD-INDUCED DEFORMATIONS IN NEMATIC LAYERS WITH NONZERO SPLAY-BEND ELASTIC-CONSTANT

The magnetic field-induced deformations of weakly anchored nematic lay ers in the presence of the non-zero splay-bend elastic constant k(13) are analysed by use of the Pergamenshchik approach. Most of the anomal ous phenomena reported by other authors, that do not occur if k(13) = 0, have been confirmed. New effects suitable for experimental verifica tion are predicted: the discontinuous transition with hysteresis betwe en the uniform undistorted state and the state uniformly aligned along the field, and the rotation of the director in the tilted layer durin g continuous increase and decrease of the perpendicular field.