The Structural Phase Transitions in 6CB-Based Ferronematics

• Authors: N. Tomašovičová , M. Koneracká , P. Kopčanský , M. Timko , V. Závišová , L. Tomčo , J. Jadżyn
• Languages of publication: EN

Abstracts

EN

The structural transitions in ferronematics based on the thermotropic nematic liquid crystal 4-cyano-4'-hexylbiphenyl were studied. The ferronematic samples were prepared by doping with magnetic suspension consisting of Fe_3O_4 particles (10 nm in diameter) coated with oleic acid as a surfactant with different volume concentrations of magnetic particles (from 10^{-5} to 10^{-3}). Freedericksz transitions were studied in combined electric and magnetic fields. The experimental results indicated soft anchoring with perpendicular initial orientation between the magnetic moment of the magnetic particles and director.

Keywords

EN

75.50.Mm; 61.30.Gd; 61.30.Hn

Discipline

• 61.30.Hn: Surface phenomena: alignment, anchoring, anchoring transitions, surface-induced layering, surface-induced ordering, wetting, prewetting transitions, and wetting transitions
• 61.30.Gd: Orientational order of liquid crystals; electric and magnetic field effects on order
• 75.50.Mm: Magnetic liquids

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 1
• Pages: 336-338

Dates

published

2009-01

Contributors

author

N. Tomašovičová

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonová 47, 04001 Košice, Slovakia

author

M. Koneracká

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonová 47, 04001 Košice, Slovakia

author

P. Kopčanský

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonová 47, 04001 Košice, Slovakia

author

M. Timko

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonová 47, 04001 Košice, Slovakia

author

V. Závišová

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonová 47, 04001 Košice, Slovakia

author

L. Tomčo

• Faculty of Aeronautics, Technical University, Rampová 7, 041 21 Košice, Slovakia

author

J. Jadżyn

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

References

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• 3. S.V. Burylov, Y.L. Raikher, J. Magn. Magn. Mater. 122, 62 (1993)
• 4. S.V. Burylov, Y.L. Raikher, Mol. Cryst. Liq. Cryst. 255, 107 (1995)
• 5. J. Czub, S. Urban, A. Wurflinger, Liq. Cryst. 33, 85 (2006)
• 6. P. Kopčanský, M. Koneracká, M. Timko, I. Potočová, L. Tomčo, N. Tomašovičová, V. Závišová, J. Jadzyn, J. Magn. Magn. Mater. 300, 75 (2006)

Identifiers

DOI

10.12693/APhysPolA.115.336