Influence of the Anisometry of Magnetic Particles on the Isotropic-Nematic Phase Transition
V. Gdovinov\'a, N. Toma\v{s}ovi\v{c}ov\'a, N. \'Eber, T., T\'oth-Katona, V. Z\'avi\v{s}ov\'a, M. Timko, P. Kop\v{c}ansk\'y
TL;DR
This study investigates how the shape anisometry of magnetic particles affects the isotropic-nematic phase transition in ferronematics, confirming theoretical predictions through experimental observations.
Contribution
It provides experimental evidence on the impact of magnetic particle shape anisometry on phase transition behavior in ferronematics, aligning with recent theories.
Findings
Shape anisometry influences the phase transition temperature.
Concentration of magnetic particles affects transition properties.
Results agree with theoretical models.
Abstract
The influence of the shape anisotropy of magnetic particles on the isotropic-nematic phase transition was studied in ferronematics based on the nematic liquid crystal 4-(trans-4-n-hexylcyclohexyl)-isothiocyanato-benzene (6CHBT). The liquid crystal was doped with spherical or rod-like magnetic particles of different size and volume concentrations. The phase transition from isotropic to nematic phase was observed by polarizing microscope as well as by capacitance measurements. The influence of the concentration and the shape anisotropy of the magnetic particles on the isotropic-nematic phase transition in liquid crystal is demonstrated. The results are in a good agreement with recent theoretical predictions.
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