Dielectric studies of the smectic C*-smectic a transition of a ferroelectric 
liquid crystal with high spontaneous polarization

Bahr, Christian; Heppke, G.; Sharma, N. K.

doi:10.1080/00150198708009034

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Dielectric studies of the smectic C*-smectic a transition of a ferroelectric liquid crystal with high spontaneous polarization

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Bahr, Christian
Group Structure formation in soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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引用

Bahr, C., Heppke, G., & Sharma, N. K. (1987). Dielectric studies of the smectic C*-smectic a transition of a ferroelectric liquid crystal with high spontaneous polarization. Ferroelectrics, 76(1), 151-157. doi:10.1080/00150198708009034.

引用: https://hdl.handle.net/11858/00-001M-0000-0029-B09B-D

要旨

The static dielectric constant ∊⊥ in the smectic A and the smectic C* phase of the ferroelectric liquid crystal 4-(3-methyl-2-chlorobutanoyloxy)-4'-heptyloxybiphenyl was determined. Strong pretransitional effects were observed in the smectic A phase. When the Goldstone mode contribution in the smectic C* phase is quenched by the application of a dc electric field, a cusp like behaviour of ∊⊥ at the smectic C*-smectic A transition can be observed which is similar to solid ferroelectrics. The maximum in ∊⊥ was found to shift to higher temperatures with increasing dc field strength in agreement with the electric field dependence of the transition temperatures reported previously.