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Bistability induced by crossed electric and magnetic fields in a nematic film
No full textThe static distortions in a homogeneously aligned nematic liquid-crystal film in crossed electric and magnetic fields are theoretically analyzed. Both fields are orthogonal to the undistorted molecular alignment and destabilizing. In the limit of small distortions, a first-order transition between two distorted configurations, with bistability and hysteresis, is obtained if the dielectric anisotropy parameter 1-ε∥/ε⊥ is lower than the elastic anisotropy parameter (k3-k2)2/(4k1k2), where k1, k2, and k3 are the Frank elastic constants. This condition is satisfied by many commonly used nematic materials. At higher distortions an inversion point is found, above which the transition becomes of the second order. At this point a phenomenon similar to the critical opalescence of fluids is expected
CRITICAL VALUES OF THE ELASTIC-CONSTANT RATIO FOR THE PERIODIC TWIST-SPLAY DISTORTION IN NEMATIC LIQUID CRYSTALS.
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ABSOLUTE MEASUREMENTS OF THE ELASTIC CONSTANTS OF NENATIC LIQUID CRYSTALS BY LIGHT SCATTERING.
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Non-linear theory of flexoelectrically induced periodic distortions in nematic liquid crystals
No full textGENERALIZED-METHOD FOR NEMATIC-LIQUID-CRYSTAL VISCOELASTIC-CONSTANT DETERMINATION BY QUASI-ELASTIC LIGHT-SCATTERING
No full textCritical tilt angle for the optical properties of short pitch chiral smectic liquid crystals
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