Orientational transitions in ferromagnetic liquid crystals with bistable coupling between colloidal particles and the matrix

We study the orientational response of a ferromagnetic liquid crystal that is induced by magnetic and electric fields. A modified form of the energy of the orientational interaction between magnetic impurity particles and the liquid crystal matrix that leads to bistable coupling is considered. It is...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2016-10, Vol.123 (4), p.687-698
Main Authors: Zakhlevnykh, A. N., Petrov, D. A.
Format: Article
Language:English
Subjects:
Analysis
Classical and Quantum Gravitation
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
Crystal structure
ELECTRIC FIELDS
Elementary Particles
Ferromagnetic materials
Ferromagnetism
IMPURITIES
INTERACTIONS
LIQUID CRYSTALS
MAGNETIZATION
Nonlinear
Optical bistability
Parameter modification
Particle and Nuclear Physics
PHASE TRANSFORMATIONS
Physics
Physics and Astronomy
Quantum Field Theory
Relativity Theory
SEGREGATION
Soft Matter Physics
Solid State Physics
Statistical
VISIBLE RADIATION
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Summary:We study the orientational response of a ferromagnetic liquid crystal that is induced by magnetic and electric fields. A modified form of the energy of the orientational interaction between magnetic impurity particles and the liquid crystal matrix that leads to bistable coupling is considered. It is shown that apart from magnetic impurity segregation, first-order orientational transitions can be due to the bistability of the potential of the orientational coupling between the director and the magnetization. The ranges of material parameters that lead to optical bistability are determined. The possibility of first-order orientational transitions is analyzed for the optical phase difference between the ordinary and extraordinary light rays transmitted through a ferronematic cell. It is shown that an electric field applied in the given geometry considerably enhances the magneto-orientational response of the ferronematic.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776116090168