Fréedericksz Transitions in 6CB Based Ferronematics—Effect of Magnetic Nanoparticles Size and Concentration

In this paper, results acquired from capacitance measurements performed on composites based on nematic liquid crystal 4-cyano-4′-hexylbiphenyl (6CB) and spherical iron oxide nanoparticles of various sizes are presented. Electric and magnetic Fréedericksz transitions, as well as structural transition...

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Autores principales: Zakutanská, Katarína, Petrov, Danil, Kopčanský, Peter, Węgłowska, Dorota, Tomašovičová, Natália
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8201281/
https://www.ncbi.nlm.nih.gov/pubmed/34198734
http://dx.doi.org/10.3390/ma14113096
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author Zakutanská, Katarína
Petrov, Danil
Kopčanský, Peter
Węgłowska, Dorota
Tomašovičová, Natália
author_facet Zakutanská, Katarína
Petrov, Danil
Kopčanský, Peter
Węgłowska, Dorota
Tomašovičová, Natália
author_sort Zakutanská, Katarína
collection PubMed
description In this paper, results acquired from capacitance measurements performed on composites based on nematic liquid crystal 4-cyano-4′-hexylbiphenyl (6CB) and spherical iron oxide nanoparticles of various sizes are presented. Electric and magnetic Fréedericksz transitions, as well as structural transitions in combined electric and magnetic fields, were investigated. The obtained results showed the lowering of the threshold magnetic field with an increase in the volume concentration of nanoparticles. Estimations based on results obtained from measurements suggest soft anchoring between liquid crystal director and nanoparticles magnetization vector.
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spelling pubmed-82012812021-06-15 Fréedericksz Transitions in 6CB Based Ferronematics—Effect of Magnetic Nanoparticles Size and Concentration Zakutanská, Katarína Petrov, Danil Kopčanský, Peter Węgłowska, Dorota Tomašovičová, Natália Materials (Basel) Article In this paper, results acquired from capacitance measurements performed on composites based on nematic liquid crystal 4-cyano-4′-hexylbiphenyl (6CB) and spherical iron oxide nanoparticles of various sizes are presented. Electric and magnetic Fréedericksz transitions, as well as structural transitions in combined electric and magnetic fields, were investigated. The obtained results showed the lowering of the threshold magnetic field with an increase in the volume concentration of nanoparticles. Estimations based on results obtained from measurements suggest soft anchoring between liquid crystal director and nanoparticles magnetization vector. MDPI 2021-06-05 /pmc/articles/PMC8201281/ /pubmed/34198734 http://dx.doi.org/10.3390/ma14113096 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zakutanská, Katarína
Petrov, Danil
Kopčanský, Peter
Węgłowska, Dorota
Tomašovičová, Natália
Fréedericksz Transitions in 6CB Based Ferronematics—Effect of Magnetic Nanoparticles Size and Concentration
title Fréedericksz Transitions in 6CB Based Ferronematics—Effect of Magnetic Nanoparticles Size and Concentration
title_full Fréedericksz Transitions in 6CB Based Ferronematics—Effect of Magnetic Nanoparticles Size and Concentration
title_fullStr Fréedericksz Transitions in 6CB Based Ferronematics—Effect of Magnetic Nanoparticles Size and Concentration
title_full_unstemmed Fréedericksz Transitions in 6CB Based Ferronematics—Effect of Magnetic Nanoparticles Size and Concentration
title_short Fréedericksz Transitions in 6CB Based Ferronematics—Effect of Magnetic Nanoparticles Size and Concentration
title_sort fréedericksz transitions in 6cb based ferronematics—effect of magnetic nanoparticles size and concentration
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8201281/
https://www.ncbi.nlm.nih.gov/pubmed/34198734
http://dx.doi.org/10.3390/ma14113096
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