Increasing the magnetic sensitivity of liquid crystals by rod-like magnetic nanoparticles

Kopċanský, P. and Tomašoviċová, N. and Tóth Katona, Tibor and Éber, Nándor and Timko, M. and Závišová, V. and Majorošová, J. and Rajňak, M. and Jadzyn, J. and Chaud, X. (2013) Increasing the magnetic sensitivity of liquid crystals by rod-like magnetic nanoparticles. MAGNETOHYDRODYNAMICS, 49 (3-4). pp. 586-591. ISSN 0024-998X

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Abstract

Magnetic Fréedericksz transition was studied in ferronematics based on the nematic liquid crystal 4-(trans-4'-n-hexylcyclohexyl)-isothiocyanatobenzene (6CHBT). 6CHBT was doped with rod-like magnetic particles of different size and volume concentration. The volume concentrations of magnetic particles in the prepared ferronematics were φ1=10−4 and φ2=10−3. Structural changes were observed by capacitance measurements, which evidenced of a significant influence of the concentration, shape anisotropy and/or the size of the magnetic particles on the magnetic response of these ferronematics.

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