The structural instabilities of ferronematic based on liquid crystal with low negative magnetic susceptibility

• Published in: Physica Status Solidi (b) Vol. 236; no. 2; pp. 450 - 453
• Main Authors: Kopčanský, P., Potočová, I., Koneracká, M., Timko, M., Jadzyn, J., Czechowski, G., A. M. G. Jansen
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Berlin WILEY-VCH Verlag 01.03.2003; WILEY‐VCH Verlag; Wiley
• Subjects: 61.30.Gd; 64.70.Md; 75.50.Mm; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Liquid crystals; Magnetic liquids; Magnetic properties and materials; Orientational order of liquid crystals; electric and magnetic field effects on order; Physics; Specific phase transitions; Structure of solids and liquids; crystallography; Studies of specific magnetic materials; Transitions in liquid crystals; Magnetic particles; Structure stability; Anisotropy; Freedericksz transformation; Magnetic field effects; Critical field; Experimental study; Magnetic transitions; Liquid crystals; Nematic crystals; Magnetic fluids; Magnetic susceptibility
• ISSN: 0370-1972; 1521-3951
• DOI: 10.1002/pssb.200301701

The Fredericksz transition in ferronematic based on liquid crystal ZLI 1695 (extremely low anisotropy of diamagnetic susceptibility χa = –3 × 10–8) was studied. The decrease of the Fredericksz transition critical magnetic fields BFN with increasing magnetic particles volume concentration was found. The surface density of anchoring energy of liquid crystal molecules on magnetic particles surfaces was experimentally estimated falling into the range (0.3–5.2) × 10–6. These estimations confirm the soft‐anchoring considered within the Burylov and Raikher's theory.