Optical Bragg reflections from a series of antiferroelectric heterocyclic esters.

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Abstract

Optical Bragg reflections were used to probe phase transitions of four heterocyclic esters that exhibit various frustrated chiral smectic phases. These transitions showed considerable hysteresis and were detected by the discontinuities of the Bragg peaks. For one of these esters, applied fields of .apprx.106 V/m completely destroyed the Bragg reflections. Smaller fields resulted in peaks of reduced intensity and shifts to longer wavelengths. [on SciFinder (R)]

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Liquid crystals (antiferroelec. optical Bragg reflection probe of phase transitions of heterocyclic esters with antiferroelec. and ferroelec. liq. crystal phases) Liquid crystals (chiral smectic optical Bragg reflection probe of phase transitions of heterocyclic esters with various frustrated chiral smectic phases) Liquid crystals (ferroelec. optical Bragg reflection probe of phase transitions of heterocyclic esters with antiferroelec. and ferroelec. liq. crystal phases) Antiferroelectric materials Ferroelectric materials (liq.-crystal optical Bragg reflection probe of phase transitions of heterocyclic esters with antiferroelec. and ferroelec. liq. crystal phases) Liquid crystals (transitions optical Bragg reflection probe of phase transitions of heterocyclic esters with various frustrated chiral smectic phases)

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