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Updated: Jan 7, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

Comprehensive Characterization of a Reference Ferroelectric Nematic Liquid Crystal Material.

Ayusha Paul¹, Milon Paul², Manisha Badu¹

¹Department of Physics, Kent State University, Kent, OH 44242, USA.

Materials (Basel, Switzerland)

|December 31, 2025

Summary

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Dynamics of the antiferroelectric smectic-Z<sub>A</sub> phase in a ferroelectric nematic liquid crystal.

Soft matter·2025

FNLC-919 liquid crystal exhibits a stable ferroelectric nematic (N_F) phase at room temperature. This study details its structural, optical, dielectric, and elastic properties, revealing insights into its unique N_X phase.

Area of Science:

Materials Science
Condensed Matter Physics
Liquid Crystal Physics

Background:

Ferroelectric nematic liquid crystals (FNLCs) are a recent development with potential applications.
FNLC-919 offers a stable, room-temperature ferroelectric nematic (N_F) phase.
Understanding mesophases between N and N_F is crucial for FNLC applications.

Purpose of the Study:

To conduct a comprehensive experimental investigation of FNLC-919.
To characterize structural, optical, dielectric, and elastic properties.
To compare FNLC-919 with benchmark compounds like DIO.

Main Methods:

Temperature-dependent characterization of ferroelectric polarization, viscosity, and nanostructure.
Determination of orientational elastic constants in N and N_X phases.

Keywords:

Freedericksz transition dielectric constants elastic constants ferroelectric liquid crystal polarization smectic ZA viscosity

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Last Updated: Jan 7, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

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Published on: August 15, 2018

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

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Published on: October 31, 2019

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Comparative analysis with DIO, focusing on the N-N_X-N_F phase sequence.

Main Results:

Detailed characterization of FNLC-919's properties across its mesophases (N, N_X, N_F).
Identification of temperature-dependent material parameters including polarization and viscosity.
Observation of a smectic-like mass density wave in the N_X phase, coinciding with antiferroelectric ordering.

Conclusions:

FNLC-919 is a promising material for fundamental research and device applications due to its stable room-temperature N_F phase.
The study provides key material parameters essential for understanding and utilizing FNLCs.
The N_X phase in FNLC-919 exhibits characteristics similar to DIO, including antiferroelectric ordering and a density wave.