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Published on: February 5, 2022
Fréedericksz Transitions in 6CB Based Ferronematics-Effect of Magnetic Nanoparticles Size and Concentration
Katarína Zakutanská1, Danil Petrov2, Peter Kopčanský1
1Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia.
Abstract:
In this paper, results acquired from capacitance measurements performed on composites based on nematic liquid crystal 4-cyano-4'-hexylbiphenyl (6CB) and spherical iron oxide nanoparticles of various sizes are presented. Electric and magnetic Fréedericksz transitions, as well as structural transitions in combined electric and magnetic fields, were investigated. The obtained results showed the lowering of the threshold magnetic field with an increase in the volume concentration of nanoparticles. Estimations based on results obtained from measurements suggest soft anchoring between liquid crystal director and nanoparticles magnetization vector.
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