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Proceedings Paper

The structural transitions in the thermotropic ferronematics
Author(s): P. Kopcansky; I. Potocova; M. Koneracka; M. Timko; Jan Jadzyn; Grzegorz Czechowski; A. M.G. Jansen
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Paper Abstract

The structural transitions in thermotropic ferronematic, i.e. nematic liquid crystal (8CB) doped with fine magnetic particles (d~10 nm), exposed to combined electric and magnetic fields, were studied within the Burylov and Raikher's theory. Using the found formulas for the threshold fields of studied transitions and their values obtained by the capacitance measurements, the anchoring energy W of liquid crystal molecules on the magnetic particles surfaces, as well as parameter ω, determining the type of anchoring, were calculated. The calculated values indicated the presence of soft, or some intermediate state between soft and rigid anchoring, in studied ferronematic. These results are in agreement with the Burylov and Raikher's theory of thermotropic ferronematics.

Paper Details

Date Published: 1 September 2004
PDF: 7 pages
Proc. SPIE 5565, XV Conference on Liquid Crystals, (1 September 2004); doi: 10.1117/12.581104
Show Author Affiliations
P. Kopcansky, Institute of Experimental Physics (Slovak Republic)
I. Potocova, Institute of Experimental Physics (Slovak Republic)
M. Koneracka, Institute of Experimental Physics (Slovak Republic)
M. Timko, Institute of Experimental Physics (Slovak Republic)
Jan Jadzyn, Institute of Molecular Physics (Poland)
Grzegorz Czechowski, Institute of Molecular Physics (Poland)
A. M.G. Jansen, Ctr. National de la Recherche Scientifique (France)

Published in SPIE Proceedings Vol. 5565:
XV Conference on Liquid Crystals
Jozef Zmija, Editor(s)

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