How to enhance sensitivity of liquid crystals to external magnetic field?

P. Kopɥanský, N. Toma͉vicová, V. Gdovinová, M. Timko, N. Éber, T. Tóth-Katona, J. Jadzyn, J. Honkonen, X. Chaud

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Liquid crystals, due to their large dielectric anisotropy, respond very sensitively to application of an external electric field, whereas they are only weakly sensitive to the magnetic field. A possible way of improving that sensitivity is doping liquid crystals with magnetic nanoparticles. As a result, stable colloidal suspensions of liquid crystals with relatively low concentrations of magnetic nanoparticles (called ferronematics, ferrocholesterics, ferrosmectics, etc.) can be produced. We illustrate some examples of the influence of the magnetic field, as well as of a superposition of magnetic and electric fields on the structural transitions (e.g. on the Fréedericksz transition) in ferronematics based on the calamitic liquid crystal 4-(trans-4'-n-hexylcyclohexyl)-isothiocyanatobenzene (6CHBT). It is shown that the samples respond to the applied magnetic field of low strength. The effects of the magnetic particles and magnetic field on the nematic to isotropic phase transition temperature are discussed as well.

Original languageEnglish
Pages (from-to)157-162
Number of pages6
JournalActa Physica Polonica A
Volume127
Issue number2
DOIs
Publication statusPublished - Feb 1 2015

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liquid crystals
sensitivity
magnetic fields
nanoparticles
electric fields
colloids
low concentrations
transition temperature
anisotropy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kopɥanský, P., Toma͉vicová, N., Gdovinová, V., Timko, M., Éber, N., Tóth-Katona, T., ... Chaud, X. (2015). How to enhance sensitivity of liquid crystals to external magnetic field? Acta Physica Polonica A, 127(2), 157-162. https://doi.org/10.12693/APhysPolA.127.157

How to enhance sensitivity of liquid crystals to external magnetic field? / Kopɥanský, P.; Toma͉vicová, N.; Gdovinová, V.; Timko, M.; Éber, N.; Tóth-Katona, T.; Jadzyn, J.; Honkonen, J.; Chaud, X.

In: Acta Physica Polonica A, Vol. 127, No. 2, 01.02.2015, p. 157-162.

Research output: Contribution to journalArticle

Kopɥanský, P, Toma͉vicová, N, Gdovinová, V, Timko, M, Éber, N, Tóth-Katona, T, Jadzyn, J, Honkonen, J & Chaud, X 2015, 'How to enhance sensitivity of liquid crystals to external magnetic field?', Acta Physica Polonica A, vol. 127, no. 2, pp. 157-162. https://doi.org/10.12693/APhysPolA.127.157
Kopɥanský, P. ; Toma͉vicová, N. ; Gdovinová, V. ; Timko, M. ; Éber, N. ; Tóth-Katona, T. ; Jadzyn, J. ; Honkonen, J. ; Chaud, X. / How to enhance sensitivity of liquid crystals to external magnetic field?. In: Acta Physica Polonica A. 2015 ; Vol. 127, No. 2. pp. 157-162.
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