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- W4296957472 abstract "The electroviscous effect deals with the change in the viscosity of fluids due to an external electric field. Here, we report experimental studies on the electroviscous effects in a ferroelectric nematic liquid crystal. It was synthesised accomplishing a new synthetic route which provides higher yield than conventional one. We measure electric field-dependent viscosity under a steady shear at different temperatures. In the low field range, the increase in viscosity ($Deltaeta=eta(E)-eta_0$) is proportional to $E^2$ and the corresponding viscoelectric coefficient ($fapprox10^{-9}$mtextsuperscript{2}/Vtextsuperscript{2}) of the ferroelectric nematic is 2 orders of magnitude larger than the apolar nematic liquid crystals and largest ever measured for a fluid. The apparent viscosity measured under a high electric field shows a power-law divergence $etasim(T-T_c)^{-0.7pm0.05}$, followed by nearly an order of magnitude drop below the N-Ntextsubscript{F} phase transition. Experimental results within the dynamical scaling approximation demonstrate rapid growth of polar domains under a strong electric field as the N-Ntextsubscript{F} phase transition is approached. The gigantic electroviscous effects demonstrated here are important for emerging applications and understanding striking electrohydromechanical effects in ferroelectric nematic liquid crystals." @default.
- W4296957472 created "2022-09-25" @default.
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- W4296957472 date "2022-09-22" @default.
- W4296957472 modified "2023-10-01" @default.
- W4296957472 title "Giant electroviscous effects in a ferroelectric nematic liquid crystal" @default.
- W4296957472 doi "https://doi.org/10.48550/arxiv.2209.11154" @default.
- W4296957472 hasPublicationYear "2022" @default.
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